From df074fb48e439ed5572894676f7ed7aa5d05986f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Istv=C3=A1n=20So=C3=B3s?= <isoos@users.noreply.github.com>
Date: Wed, 13 Dec 2023 14:01:12 +0100
Subject: [PATCH] Verify in tests that alt="" does not contain element type.
 (#7300)

---
 app/lib/frontend/dom/dom.dart                 |  2 ++
 .../templates/views/pkg/score_tab.dart        |  2 +-
 .../templates/views/shared/search_banner.dart |  4 +--
 .../templates/views/shared/site_header.dart   |  2 +-
 app/test/frontend/golden/authorized_page.html |  6 ++--
 app/test/frontend/golden/consent_page.html    |  6 ++--
 .../golden/create_publisher_page.html         |  6 ++--
 app/test/frontend/golden/error_page.html      |  6 ++--
 app/test/frontend/golden/help_page.html       |  6 ++--
 app/test/frontend/golden/landing_page.html    |  6 ++--
 .../frontend/golden/my_activity_log_page.html |  6 ++--
 .../frontend/golden/my_liked_packages.html    |  6 ++--
 app/test/frontend/golden/my_packages.html     |  6 ++--
 app/test/frontend/golden/my_publishers.html   |  6 ++--
 .../golden/pkg_activity_log_page.html         |  6 ++--
 app/test/frontend/golden/pkg_admin_page.html  |  6 ++--
 .../frontend/golden/pkg_changelog_page.html   |  6 ++--
 .../frontend/golden/pkg_example_page.html     |  6 ++--
 app/test/frontend/golden/pkg_index_page.html  | 10 +++---
 .../frontend/golden/pkg_install_page.html     |  6 ++--
 app/test/frontend/golden/pkg_score_page.html  | 10 +++---
 app/test/frontend/golden/pkg_show_page.html   |  6 ++--
 .../golden/pkg_show_page_discontinued.html    |  6 ++--
 .../golden/pkg_show_page_flutter_plugin.html  |  6 ++--
 .../golden/pkg_show_page_publisher.html       |  6 ++--
 .../golden/pkg_show_page_retracted.html       |  6 ++--
 ..._page_retracted_non_retracted_version.html |  6 ++--
 .../golden/pkg_show_version_page.html         |  6 ++--
 .../frontend/golden/pkg_versions_page.html    |  6 ++--
 .../golden/publisher_activity_log_page.html   |  6 ++--
 .../frontend/golden/publisher_admin_page.html |  6 ++--
 .../frontend/golden/publisher_list_page.html  | 10 +++---
 .../golden/publisher_packages_page.html       |  6 ++--
 .../publisher_unlisted_packages_page.html     |  6 ++--
 app/test/frontend/golden/search_page.html     | 10 +++---
 app/test/frontend/golden/topics_page.html     |  6 ++--
 .../testdata/goldens/packages/oxygen.html     |  6 ++--
 .../goldens/packages/oxygen/changelog.html    |  6 ++--
 .../goldens/packages/oxygen/example.html      |  6 ++--
 .../goldens/packages/oxygen/install.html      |  6 ++--
 .../goldens/packages/oxygen/license.html      |  6 ++--
 .../goldens/packages/oxygen/score.html        | 16 +++++-----
 .../goldens/packages/oxygen/versions.html     |  6 ++--
 .../packages/oxygen/versions/1.0.0.html       |  6 ++--
 .../oxygen/versions/1.0.0/changelog.html      |  6 ++--
 .../oxygen/versions/1.0.0/example.html        |  6 ++--
 .../oxygen/versions/1.0.0/install.html        |  6 ++--
 .../oxygen/versions/1.0.0/license.html        |  6 ++--
 .../packages/oxygen/versions/1.0.0/score.html | 16 +++++-----
 .../packages/oxygen/versions/2.0.0.html       |  6 ++--
 .../lib/validation/html/html_validation.dart  | 31 ++++++++++---------
 51 files changed, 178 insertions(+), 175 deletions(-)

diff --git a/app/lib/frontend/dom/dom.dart b/app/lib/frontend/dom/dom.dart
index 26b76f0cc6..0160beed23 100644
--- a/app/lib/frontend/dom/dom.dart
+++ b/app/lib/frontend/dom/dom.dart
@@ -448,6 +448,8 @@ class Image {
 
   Image({
     required this.src,
+
+    /// Note: the `alt` text of elements should not include the element type (e.g. `icon`).
     required this.alt,
     required this.width,
     required this.height,
diff --git a/app/lib/frontend/templates/views/pkg/score_tab.dart b/app/lib/frontend/templates/views/pkg/score_tab.dart
index 7e77e843c6..d912dbe7dc 100644
--- a/app/lib/frontend/templates/views/pkg/score_tab.dart
+++ b/app/lib/frontend/templates/views/pkg/score_tab.dart
@@ -140,7 +140,7 @@ d.Node _section(ReportSection section) {
                   image: d.Image(
                     src: staticUrls
                         .getAssetUrl('/static/img/report-foldable-icon.svg'),
-                    alt: 'icon to trigger folding of the section',
+                    alt: 'trigger folding of the section',
                     width: 13,
                     height: 6,
                   ),
diff --git a/app/lib/frontend/templates/views/shared/search_banner.dart b/app/lib/frontend/templates/views/shared/search_banner.dart
index f4ab45a640..b905738bfa 100644
--- a/app/lib/frontend/templates/views/shared/search_banner.dart
+++ b/app/lib/frontend/templates/views/shared/search_banner.dart
@@ -43,7 +43,7 @@ d.Node searchBannerNode({
               image: d.Image(
                 src: staticUrls
                     .getAssetUrl('/static/img/search-filters-inactive.svg'),
-                alt: 'icon to toggle the display of search filters (inactive)',
+                alt: 'toggle the display of search filters (inactive)',
                 width: 42,
                 height: 42,
               ),
@@ -53,7 +53,7 @@ d.Node searchBannerNode({
               image: d.Image(
                 src: staticUrls
                     .getAssetUrl('/static/img/search-filters-active.svg'),
-                alt: 'icon to toggle the display of search filters (active)',
+                alt: 'toggle the display of search filters (active)',
                 width: 42,
                 height: 42,
               ),
diff --git a/app/lib/frontend/templates/views/shared/site_header.dart b/app/lib/frontend/templates/views/shared/site_header.dart
index df8742c38c..92ae2dcb14 100644
--- a/app/lib/frontend/templates/views/shared/site_header.dart
+++ b/app/lib/frontend/templates/views/shared/site_header.dart
@@ -237,7 +237,7 @@ d.Node _foldableMobileLinks(String label, Iterable<d.Node> children) {
             image: d.Image(
               src: staticUrls
                   .getAssetUrl('/static/img/nav-mobile-foldable-icon.svg'),
-              alt: 'icon to toggle folding of the section',
+              alt: 'toggle folding of the section',
               width: 13,
               height: 6,
             ),
diff --git a/app/test/frontend/golden/authorized_page.html b/app/test/frontend/golden/authorized_page.html
index 31d9b45f4f..6e6fda48f6 100644
--- a/app/test/frontend/golden/authorized_page.html
+++ b/app/test/frontend/golden/authorized_page.html
@@ -74,7 +74,7 @@ <h3>Dart</h3>
         <div class="nav-container nav-help-container-mobile foldable">
           <h3 class="foldable-button">
             Pub.dev
-            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="icon to toggle folding of the section" width="13" height="6"/>
+            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="toggle folding of the section" width="13" height="6"/>
           </h3>
           <div class="foldable-content">
             <a class="nav-link" href="/help/search" rel="noopener" target="_blank">Searching for packages</a>
@@ -84,7 +84,7 @@ <h3 class="foldable-button">
         <div class="nav-container nav-help-container-mobile foldable">
           <h3 class="foldable-button">
             Flutter
-            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="icon to toggle folding of the section" width="13" height="6"/>
+            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="toggle folding of the section" width="13" height="6"/>
           </h3>
           <div class="foldable-content">
             <a class="nav-link" href="https://flutter.dev/using-packages/" rel="noopener" target="_blank">Using packages</a>
@@ -95,7 +95,7 @@ <h3 class="foldable-button">
         <div class="nav-container nav-help-container-mobile foldable">
           <h3 class="foldable-button">
             Dart
-            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="icon to toggle folding of the section" width="13" height="6"/>
+            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="toggle folding of the section" width="13" height="6"/>
           </h3>
           <div class="foldable-content">
             <a class="nav-link" href="https://dart.dev/guides/packages" rel="noopener" target="_blank">Using packages</a>
diff --git a/app/test/frontend/golden/consent_page.html b/app/test/frontend/golden/consent_page.html
index 57b3cac044..4d4bfdc7f0 100644
--- a/app/test/frontend/golden/consent_page.html
+++ b/app/test/frontend/golden/consent_page.html
@@ -74,7 +74,7 @@ <h3>Dart</h3>
         <div class="nav-container nav-help-container-mobile foldable">
           <h3 class="foldable-button">
             Pub.dev
-            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="icon to toggle folding of the section" width="13" height="6"/>
+            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="toggle folding of the section" width="13" height="6"/>
           </h3>
           <div class="foldable-content">
             <a class="nav-link" href="/help/search" rel="noopener" target="_blank">Searching for packages</a>
@@ -84,7 +84,7 @@ <h3 class="foldable-button">
         <div class="nav-container nav-help-container-mobile foldable">
           <h3 class="foldable-button">
             Flutter
-            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="icon to toggle folding of the section" width="13" height="6"/>
+            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="toggle folding of the section" width="13" height="6"/>
           </h3>
           <div class="foldable-content">
             <a class="nav-link" href="https://flutter.dev/using-packages/" rel="noopener" target="_blank">Using packages</a>
@@ -95,7 +95,7 @@ <h3 class="foldable-button">
         <div class="nav-container nav-help-container-mobile foldable">
           <h3 class="foldable-button">
             Dart
-            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="icon to toggle folding of the section" width="13" height="6"/>
+            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="toggle folding of the section" width="13" height="6"/>
           </h3>
           <div class="foldable-content">
             <a class="nav-link" href="https://dart.dev/guides/packages" rel="noopener" target="_blank">Using packages</a>
diff --git a/app/test/frontend/golden/create_publisher_page.html b/app/test/frontend/golden/create_publisher_page.html
index 4fc142e30b..4b1fcb3813 100644
--- a/app/test/frontend/golden/create_publisher_page.html
+++ b/app/test/frontend/golden/create_publisher_page.html
@@ -73,7 +73,7 @@ <h3>Dart</h3>
         <div class="nav-container nav-help-container-mobile foldable">
           <h3 class="foldable-button">
             Pub.dev
-            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="icon to toggle folding of the section" width="13" height="6"/>
+            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="toggle folding of the section" width="13" height="6"/>
           </h3>
           <div class="foldable-content">
             <a class="nav-link" href="/help/search" rel="noopener" target="_blank">Searching for packages</a>
@@ -83,7 +83,7 @@ <h3 class="foldable-button">
         <div class="nav-container nav-help-container-mobile foldable">
           <h3 class="foldable-button">
             Flutter
-            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="icon to toggle folding of the section" width="13" height="6"/>
+            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="toggle folding of the section" width="13" height="6"/>
           </h3>
           <div class="foldable-content">
             <a class="nav-link" href="https://flutter.dev/using-packages/" rel="noopener" target="_blank">Using packages</a>
@@ -94,7 +94,7 @@ <h3 class="foldable-button">
         <div class="nav-container nav-help-container-mobile foldable">
           <h3 class="foldable-button">
             Dart
-            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="icon to toggle folding of the section" width="13" height="6"/>
+            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="toggle folding of the section" width="13" height="6"/>
           </h3>
           <div class="foldable-content">
             <a class="nav-link" href="https://dart.dev/guides/packages" rel="noopener" target="_blank">Using packages</a>
diff --git a/app/test/frontend/golden/error_page.html b/app/test/frontend/golden/error_page.html
index 60a067d1da..a0efc336e9 100644
--- a/app/test/frontend/golden/error_page.html
+++ b/app/test/frontend/golden/error_page.html
@@ -68,7 +68,7 @@ <h3>Dart</h3>
         <div class="nav-container nav-help-container-mobile foldable">
           <h3 class="foldable-button">
             Pub.dev
-            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="icon to toggle folding of the section" width="13" height="6"/>
+            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="toggle folding of the section" width="13" height="6"/>
           </h3>
           <div class="foldable-content">
             <a class="nav-link" href="/help/search" rel="noopener" target="_blank">Searching for packages</a>
@@ -78,7 +78,7 @@ <h3 class="foldable-button">
         <div class="nav-container nav-help-container-mobile foldable">
           <h3 class="foldable-button">
             Flutter
-            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="icon to toggle folding of the section" width="13" height="6"/>
+            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="toggle folding of the section" width="13" height="6"/>
           </h3>
           <div class="foldable-content">
             <a class="nav-link" href="https://flutter.dev/using-packages/" rel="noopener" target="_blank">Using packages</a>
@@ -89,7 +89,7 @@ <h3 class="foldable-button">
         <div class="nav-container nav-help-container-mobile foldable">
           <h3 class="foldable-button">
             Dart
-            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="icon to toggle folding of the section" width="13" height="6"/>
+            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="toggle folding of the section" width="13" height="6"/>
           </h3>
           <div class="foldable-content">
             <a class="nav-link" href="https://dart.dev/guides/packages" rel="noopener" target="_blank">Using packages</a>
diff --git a/app/test/frontend/golden/help_page.html b/app/test/frontend/golden/help_page.html
index fe2be06766..a8624795cc 100644
--- a/app/test/frontend/golden/help_page.html
+++ b/app/test/frontend/golden/help_page.html
@@ -74,7 +74,7 @@ <h3>Dart</h3>
         <div class="nav-container nav-help-container-mobile foldable">
           <h3 class="foldable-button">
             Pub.dev
-            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="icon to toggle folding of the section" width="13" height="6"/>
+            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="toggle folding of the section" width="13" height="6"/>
           </h3>
           <div class="foldable-content">
             <a class="nav-link" href="/help/search" rel="noopener" target="_blank">Searching for packages</a>
@@ -84,7 +84,7 @@ <h3 class="foldable-button">
         <div class="nav-container nav-help-container-mobile foldable">
           <h3 class="foldable-button">
             Flutter
-            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="icon to toggle folding of the section" width="13" height="6"/>
+            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="toggle folding of the section" width="13" height="6"/>
           </h3>
           <div class="foldable-content">
             <a class="nav-link" href="https://flutter.dev/using-packages/" rel="noopener" target="_blank">Using packages</a>
@@ -95,7 +95,7 @@ <h3 class="foldable-button">
         <div class="nav-container nav-help-container-mobile foldable">
           <h3 class="foldable-button">
             Dart
-            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="icon to toggle folding of the section" width="13" height="6"/>
+            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="toggle folding of the section" width="13" height="6"/>
           </h3>
           <div class="foldable-content">
             <a class="nav-link" href="https://dart.dev/guides/packages" rel="noopener" target="_blank">Using packages</a>
diff --git a/app/test/frontend/golden/landing_page.html b/app/test/frontend/golden/landing_page.html
index b73a04d289..13a4b06a6a 100644
--- a/app/test/frontend/golden/landing_page.html
+++ b/app/test/frontend/golden/landing_page.html
@@ -68,7 +68,7 @@ <h3>Dart</h3>
         <div class="nav-container nav-help-container-mobile foldable">
           <h3 class="foldable-button">
             Pub.dev
-            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="icon to toggle folding of the section" width="13" height="6"/>
+            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="toggle folding of the section" width="13" height="6"/>
           </h3>
           <div class="foldable-content">
             <a class="nav-link" href="/help/search" rel="noopener" target="_blank">Searching for packages</a>
@@ -78,7 +78,7 @@ <h3 class="foldable-button">
         <div class="nav-container nav-help-container-mobile foldable">
           <h3 class="foldable-button">
             Flutter
-            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="icon to toggle folding of the section" width="13" height="6"/>
+            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="toggle folding of the section" width="13" height="6"/>
           </h3>
           <div class="foldable-content">
             <a class="nav-link" href="https://flutter.dev/using-packages/" rel="noopener" target="_blank">Using packages</a>
@@ -89,7 +89,7 @@ <h3 class="foldable-button">
         <div class="nav-container nav-help-container-mobile foldable">
           <h3 class="foldable-button">
             Dart
-            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="icon to toggle folding of the section" width="13" height="6"/>
+            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="toggle folding of the section" width="13" height="6"/>
           </h3>
           <div class="foldable-content">
             <a class="nav-link" href="https://dart.dev/guides/packages" rel="noopener" target="_blank">Using packages</a>
diff --git a/app/test/frontend/golden/my_activity_log_page.html b/app/test/frontend/golden/my_activity_log_page.html
index 2e366512ac..4788e06918 100644
--- a/app/test/frontend/golden/my_activity_log_page.html
+++ b/app/test/frontend/golden/my_activity_log_page.html
@@ -83,7 +83,7 @@ <h3>Dart</h3>
         <div class="nav-container nav-help-container-mobile foldable">
           <h3 class="foldable-button">
             Pub.dev
-            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="icon to toggle folding of the section" width="13" height="6"/>
+            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="toggle folding of the section" width="13" height="6"/>
           </h3>
           <div class="foldable-content">
             <a class="nav-link" href="/help/search" rel="noopener" target="_blank">Searching for packages</a>
@@ -93,7 +93,7 @@ <h3 class="foldable-button">
         <div class="nav-container nav-help-container-mobile foldable">
           <h3 class="foldable-button">
             Flutter
-            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="icon to toggle folding of the section" width="13" height="6"/>
+            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="toggle folding of the section" width="13" height="6"/>
           </h3>
           <div class="foldable-content">
             <a class="nav-link" href="https://flutter.dev/using-packages/" rel="noopener" target="_blank">Using packages</a>
@@ -104,7 +104,7 @@ <h3 class="foldable-button">
         <div class="nav-container nav-help-container-mobile foldable">
           <h3 class="foldable-button">
             Dart
-            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="icon to toggle folding of the section" width="13" height="6"/>
+            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="toggle folding of the section" width="13" height="6"/>
           </h3>
           <div class="foldable-content">
             <a class="nav-link" href="https://dart.dev/guides/packages" rel="noopener" target="_blank">Using packages</a>
diff --git a/app/test/frontend/golden/my_liked_packages.html b/app/test/frontend/golden/my_liked_packages.html
index 760d7be8d0..f6a9a96452 100644
--- a/app/test/frontend/golden/my_liked_packages.html
+++ b/app/test/frontend/golden/my_liked_packages.html
@@ -84,7 +84,7 @@ <h3>Dart</h3>
         <div class="nav-container nav-help-container-mobile foldable">
           <h3 class="foldable-button">
             Pub.dev
-            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="icon to toggle folding of the section" width="13" height="6"/>
+            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="toggle folding of the section" width="13" height="6"/>
           </h3>
           <div class="foldable-content">
             <a class="nav-link" href="/help/search" rel="noopener" target="_blank">Searching for packages</a>
@@ -94,7 +94,7 @@ <h3 class="foldable-button">
         <div class="nav-container nav-help-container-mobile foldable">
           <h3 class="foldable-button">
             Flutter
-            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="icon to toggle folding of the section" width="13" height="6"/>
+            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="toggle folding of the section" width="13" height="6"/>
           </h3>
           <div class="foldable-content">
             <a class="nav-link" href="https://flutter.dev/using-packages/" rel="noopener" target="_blank">Using packages</a>
@@ -105,7 +105,7 @@ <h3 class="foldable-button">
         <div class="nav-container nav-help-container-mobile foldable">
           <h3 class="foldable-button">
             Dart
-            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="icon to toggle folding of the section" width="13" height="6"/>
+            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="toggle folding of the section" width="13" height="6"/>
           </h3>
           <div class="foldable-content">
             <a class="nav-link" href="https://dart.dev/guides/packages" rel="noopener" target="_blank">Using packages</a>
diff --git a/app/test/frontend/golden/my_packages.html b/app/test/frontend/golden/my_packages.html
index 37059c1695..9428bcd2c9 100644
--- a/app/test/frontend/golden/my_packages.html
+++ b/app/test/frontend/golden/my_packages.html
@@ -83,7 +83,7 @@ <h3>Dart</h3>
         <div class="nav-container nav-help-container-mobile foldable">
           <h3 class="foldable-button">
             Pub.dev
-            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="icon to toggle folding of the section" width="13" height="6"/>
+            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="toggle folding of the section" width="13" height="6"/>
           </h3>
           <div class="foldable-content">
             <a class="nav-link" href="/help/search" rel="noopener" target="_blank">Searching for packages</a>
@@ -93,7 +93,7 @@ <h3 class="foldable-button">
         <div class="nav-container nav-help-container-mobile foldable">
           <h3 class="foldable-button">
             Flutter
-            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="icon to toggle folding of the section" width="13" height="6"/>
+            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="toggle folding of the section" width="13" height="6"/>
           </h3>
           <div class="foldable-content">
             <a class="nav-link" href="https://flutter.dev/using-packages/" rel="noopener" target="_blank">Using packages</a>
@@ -104,7 +104,7 @@ <h3 class="foldable-button">
         <div class="nav-container nav-help-container-mobile foldable">
           <h3 class="foldable-button">
             Dart
-            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="icon to toggle folding of the section" width="13" height="6"/>
+            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="toggle folding of the section" width="13" height="6"/>
           </h3>
           <div class="foldable-content">
             <a class="nav-link" href="https://dart.dev/guides/packages" rel="noopener" target="_blank">Using packages</a>
diff --git a/app/test/frontend/golden/my_publishers.html b/app/test/frontend/golden/my_publishers.html
index bade5c1c3d..e29a4b7538 100644
--- a/app/test/frontend/golden/my_publishers.html
+++ b/app/test/frontend/golden/my_publishers.html
@@ -83,7 +83,7 @@ <h3>Dart</h3>
         <div class="nav-container nav-help-container-mobile foldable">
           <h3 class="foldable-button">
             Pub.dev
-            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="icon to toggle folding of the section" width="13" height="6"/>
+            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="toggle folding of the section" width="13" height="6"/>
           </h3>
           <div class="foldable-content">
             <a class="nav-link" href="/help/search" rel="noopener" target="_blank">Searching for packages</a>
@@ -93,7 +93,7 @@ <h3 class="foldable-button">
         <div class="nav-container nav-help-container-mobile foldable">
           <h3 class="foldable-button">
             Flutter
-            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="icon to toggle folding of the section" width="13" height="6"/>
+            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="toggle folding of the section" width="13" height="6"/>
           </h3>
           <div class="foldable-content">
             <a class="nav-link" href="https://flutter.dev/using-packages/" rel="noopener" target="_blank">Using packages</a>
@@ -104,7 +104,7 @@ <h3 class="foldable-button">
         <div class="nav-container nav-help-container-mobile foldable">
           <h3 class="foldable-button">
             Dart
-            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="icon to toggle folding of the section" width="13" height="6"/>
+            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="toggle folding of the section" width="13" height="6"/>
           </h3>
           <div class="foldable-content">
             <a class="nav-link" href="https://dart.dev/guides/packages" rel="noopener" target="_blank">Using packages</a>
diff --git a/app/test/frontend/golden/pkg_activity_log_page.html b/app/test/frontend/golden/pkg_activity_log_page.html
index 88af7800a2..77346ff79c 100644
--- a/app/test/frontend/golden/pkg_activity_log_page.html
+++ b/app/test/frontend/golden/pkg_activity_log_page.html
@@ -85,7 +85,7 @@ <h3>Dart</h3>
         <div class="nav-container nav-help-container-mobile foldable">
           <h3 class="foldable-button">
             Pub.dev
-            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="icon to toggle folding of the section" width="13" height="6"/>
+            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="toggle folding of the section" width="13" height="6"/>
           </h3>
           <div class="foldable-content">
             <a class="nav-link" href="/help/search" rel="noopener" target="_blank">Searching for packages</a>
@@ -95,7 +95,7 @@ <h3 class="foldable-button">
         <div class="nav-container nav-help-container-mobile foldable">
           <h3 class="foldable-button">
             Flutter
-            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="icon to toggle folding of the section" width="13" height="6"/>
+            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="toggle folding of the section" width="13" height="6"/>
           </h3>
           <div class="foldable-content">
             <a class="nav-link" href="https://flutter.dev/using-packages/" rel="noopener" target="_blank">Using packages</a>
@@ -106,7 +106,7 @@ <h3 class="foldable-button">
         <div class="nav-container nav-help-container-mobile foldable">
           <h3 class="foldable-button">
             Dart
-            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="icon to toggle folding of the section" width="13" height="6"/>
+            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="toggle folding of the section" width="13" height="6"/>
           </h3>
           <div class="foldable-content">
             <a class="nav-link" href="https://dart.dev/guides/packages" rel="noopener" target="_blank">Using packages</a>
diff --git a/app/test/frontend/golden/pkg_admin_page.html b/app/test/frontend/golden/pkg_admin_page.html
index 08773d73ab..b5a58b02b8 100644
--- a/app/test/frontend/golden/pkg_admin_page.html
+++ b/app/test/frontend/golden/pkg_admin_page.html
@@ -85,7 +85,7 @@ <h3>Dart</h3>
         <div class="nav-container nav-help-container-mobile foldable">
           <h3 class="foldable-button">
             Pub.dev
-            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="icon to toggle folding of the section" width="13" height="6"/>
+            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="toggle folding of the section" width="13" height="6"/>
           </h3>
           <div class="foldable-content">
             <a class="nav-link" href="/help/search" rel="noopener" target="_blank">Searching for packages</a>
@@ -95,7 +95,7 @@ <h3 class="foldable-button">
         <div class="nav-container nav-help-container-mobile foldable">
           <h3 class="foldable-button">
             Flutter
-            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="icon to toggle folding of the section" width="13" height="6"/>
+            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="toggle folding of the section" width="13" height="6"/>
           </h3>
           <div class="foldable-content">
             <a class="nav-link" href="https://flutter.dev/using-packages/" rel="noopener" target="_blank">Using packages</a>
@@ -106,7 +106,7 @@ <h3 class="foldable-button">
         <div class="nav-container nav-help-container-mobile foldable">
           <h3 class="foldable-button">
             Dart
-            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="icon to toggle folding of the section" width="13" height="6"/>
+            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="toggle folding of the section" width="13" height="6"/>
           </h3>
           <div class="foldable-content">
             <a class="nav-link" href="https://dart.dev/guides/packages" rel="noopener" target="_blank">Using packages</a>
diff --git a/app/test/frontend/golden/pkg_changelog_page.html b/app/test/frontend/golden/pkg_changelog_page.html
index 8c0889344e..e0576308b5 100644
--- a/app/test/frontend/golden/pkg_changelog_page.html
+++ b/app/test/frontend/golden/pkg_changelog_page.html
@@ -76,7 +76,7 @@ <h3>Dart</h3>
         <div class="nav-container nav-help-container-mobile foldable">
           <h3 class="foldable-button">
             Pub.dev
-            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="icon to toggle folding of the section" width="13" height="6"/>
+            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="toggle folding of the section" width="13" height="6"/>
           </h3>
           <div class="foldable-content">
             <a class="nav-link" href="/help/search" rel="noopener" target="_blank">Searching for packages</a>
@@ -86,7 +86,7 @@ <h3 class="foldable-button">
         <div class="nav-container nav-help-container-mobile foldable">
           <h3 class="foldable-button">
             Flutter
-            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="icon to toggle folding of the section" width="13" height="6"/>
+            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="toggle folding of the section" width="13" height="6"/>
           </h3>
           <div class="foldable-content">
             <a class="nav-link" href="https://flutter.dev/using-packages/" rel="noopener" target="_blank">Using packages</a>
@@ -97,7 +97,7 @@ <h3 class="foldable-button">
         <div class="nav-container nav-help-container-mobile foldable">
           <h3 class="foldable-button">
             Dart
-            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="icon to toggle folding of the section" width="13" height="6"/>
+            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="toggle folding of the section" width="13" height="6"/>
           </h3>
           <div class="foldable-content">
             <a class="nav-link" href="https://dart.dev/guides/packages" rel="noopener" target="_blank">Using packages</a>
diff --git a/app/test/frontend/golden/pkg_example_page.html b/app/test/frontend/golden/pkg_example_page.html
index a9a105020a..3967e98ba1 100644
--- a/app/test/frontend/golden/pkg_example_page.html
+++ b/app/test/frontend/golden/pkg_example_page.html
@@ -76,7 +76,7 @@ <h3>Dart</h3>
         <div class="nav-container nav-help-container-mobile foldable">
           <h3 class="foldable-button">
             Pub.dev
-            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="icon to toggle folding of the section" width="13" height="6"/>
+            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="toggle folding of the section" width="13" height="6"/>
           </h3>
           <div class="foldable-content">
             <a class="nav-link" href="/help/search" rel="noopener" target="_blank">Searching for packages</a>
@@ -86,7 +86,7 @@ <h3 class="foldable-button">
         <div class="nav-container nav-help-container-mobile foldable">
           <h3 class="foldable-button">
             Flutter
-            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="icon to toggle folding of the section" width="13" height="6"/>
+            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="toggle folding of the section" width="13" height="6"/>
           </h3>
           <div class="foldable-content">
             <a class="nav-link" href="https://flutter.dev/using-packages/" rel="noopener" target="_blank">Using packages</a>
@@ -97,7 +97,7 @@ <h3 class="foldable-button">
         <div class="nav-container nav-help-container-mobile foldable">
           <h3 class="foldable-button">
             Dart
-            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="icon to toggle folding of the section" width="13" height="6"/>
+            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="toggle folding of the section" width="13" height="6"/>
           </h3>
           <div class="foldable-content">
             <a class="nav-link" href="https://dart.dev/guides/packages" rel="noopener" target="_blank">Using packages</a>
diff --git a/app/test/frontend/golden/pkg_index_page.html b/app/test/frontend/golden/pkg_index_page.html
index c37f4400bd..4e9c910aa7 100644
--- a/app/test/frontend/golden/pkg_index_page.html
+++ b/app/test/frontend/golden/pkg_index_page.html
@@ -69,7 +69,7 @@ <h3>Dart</h3>
         <div class="nav-container nav-help-container-mobile foldable">
           <h3 class="foldable-button">
             Pub.dev
-            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="icon to toggle folding of the section" width="13" height="6"/>
+            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="toggle folding of the section" width="13" height="6"/>
           </h3>
           <div class="foldable-content">
             <a class="nav-link" href="/help/search" rel="noopener" target="_blank">Searching for packages</a>
@@ -79,7 +79,7 @@ <h3 class="foldable-button">
         <div class="nav-container nav-help-container-mobile foldable">
           <h3 class="foldable-button">
             Flutter
-            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="icon to toggle folding of the section" width="13" height="6"/>
+            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="toggle folding of the section" width="13" height="6"/>
           </h3>
           <div class="foldable-content">
             <a class="nav-link" href="https://flutter.dev/using-packages/" rel="noopener" target="_blank">Using packages</a>
@@ -90,7 +90,7 @@ <h3 class="foldable-button">
         <div class="nav-container nav-help-container-mobile foldable">
           <h3 class="foldable-button">
             Dart
-            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="icon to toggle folding of the section" width="13" height="6"/>
+            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="toggle folding of the section" width="13" height="6"/>
           </h3>
           <div class="foldable-content">
             <a class="nav-link" href="https://dart.dev/guides/packages" rel="noopener" target="_blank">Using packages</a>
@@ -106,8 +106,8 @@ <h3 class="foldable-button">
           <input class="input" name="q" placeholder="Search packages" autocomplete="on" value="sdk:dart" title="Search" aria-label="Search"/>
           <span class="icon"></span>
           <div class="search-filters-btn-wrapper -active">
-            <img class="search-filters-btn search-filters-btn-inactive" src="/static/hash-%%etag%%/img/search-filters-inactive.svg" alt="icon to toggle the display of search filters (inactive)" width="42" height="42"/>
-            <img class="search-filters-btn search-filters-btn-active" src="/static/hash-%%etag%%/img/search-filters-active.svg" alt="icon to toggle the display of search filters (active)" width="42" height="42"/>
+            <img class="search-filters-btn search-filters-btn-inactive" src="/static/hash-%%etag%%/img/search-filters-inactive.svg" alt="toggle the display of search filters (inactive)" width="42" height="42"/>
+            <img class="search-filters-btn search-filters-btn-active" src="/static/hash-%%etag%%/img/search-filters-active.svg" alt="toggle the display of search filters (active)" width="42" height="42"/>
           </div>
         </form>
       </div>
diff --git a/app/test/frontend/golden/pkg_install_page.html b/app/test/frontend/golden/pkg_install_page.html
index 1af11b966c..32c98a1a30 100644
--- a/app/test/frontend/golden/pkg_install_page.html
+++ b/app/test/frontend/golden/pkg_install_page.html
@@ -76,7 +76,7 @@ <h3>Dart</h3>
         <div class="nav-container nav-help-container-mobile foldable">
           <h3 class="foldable-button">
             Pub.dev
-            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="icon to toggle folding of the section" width="13" height="6"/>
+            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="toggle folding of the section" width="13" height="6"/>
           </h3>
           <div class="foldable-content">
             <a class="nav-link" href="/help/search" rel="noopener" target="_blank">Searching for packages</a>
@@ -86,7 +86,7 @@ <h3 class="foldable-button">
         <div class="nav-container nav-help-container-mobile foldable">
           <h3 class="foldable-button">
             Flutter
-            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="icon to toggle folding of the section" width="13" height="6"/>
+            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="toggle folding of the section" width="13" height="6"/>
           </h3>
           <div class="foldable-content">
             <a class="nav-link" href="https://flutter.dev/using-packages/" rel="noopener" target="_blank">Using packages</a>
@@ -97,7 +97,7 @@ <h3 class="foldable-button">
         <div class="nav-container nav-help-container-mobile foldable">
           <h3 class="foldable-button">
             Dart
-            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="icon to toggle folding of the section" width="13" height="6"/>
+            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="toggle folding of the section" width="13" height="6"/>
           </h3>
           <div class="foldable-content">
             <a class="nav-link" href="https://dart.dev/guides/packages" rel="noopener" target="_blank">Using packages</a>
diff --git a/app/test/frontend/golden/pkg_score_page.html b/app/test/frontend/golden/pkg_score_page.html
index f822be1298..f3c849cd6f 100644
--- a/app/test/frontend/golden/pkg_score_page.html
+++ b/app/test/frontend/golden/pkg_score_page.html
@@ -76,7 +76,7 @@ <h3>Dart</h3>
         <div class="nav-container nav-help-container-mobile foldable">
           <h3 class="foldable-button">
             Pub.dev
-            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="icon to toggle folding of the section" width="13" height="6"/>
+            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="toggle folding of the section" width="13" height="6"/>
           </h3>
           <div class="foldable-content">
             <a class="nav-link" href="/help/search" rel="noopener" target="_blank">Searching for packages</a>
@@ -86,7 +86,7 @@ <h3 class="foldable-button">
         <div class="nav-container nav-help-container-mobile foldable">
           <h3 class="foldable-button">
             Flutter
-            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="icon to toggle folding of the section" width="13" height="6"/>
+            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="toggle folding of the section" width="13" height="6"/>
           </h3>
           <div class="foldable-content">
             <a class="nav-link" href="https://flutter.dev/using-packages/" rel="noopener" target="_blank">Using packages</a>
@@ -97,7 +97,7 @@ <h3 class="foldable-button">
         <div class="nav-container nav-help-container-mobile foldable">
           <h3 class="foldable-button">
             Dart
-            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="icon to toggle folding of the section" width="13" height="6"/>
+            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="toggle folding of the section" width="13" height="6"/>
           </h3>
           <div class="foldable-content">
             <a class="nav-link" href="https://dart.dev/guides/packages" rel="noopener" target="_blank">Using packages</a>
@@ -247,7 +247,7 @@ <h3 class="detail-lead-title">Metadata</h3>
                           <span class="pkg-report-header-score-granted">18</span>
                           /
                           <span class="pkg-report-header-score-max">30</span>
-                          <img class="foldable-icon" src="/static/hash-%%etag%%/img/report-foldable-icon.svg" alt="icon to trigger folding of the section" width="13" height="6"/>
+                          <img class="foldable-icon" src="/static/hash-%%etag%%/img/report-foldable-icon.svg" alt="trigger folding of the section" width="13" height="6"/>
                         </div>
                       </div>
                       <div class="foldable-content">
@@ -274,7 +274,7 @@ <h3>
                           <span class="pkg-report-header-score-granted">36</span>
                           /
                           <span class="pkg-report-header-score-max">40</span>
-                          <img class="foldable-icon" src="/static/hash-%%etag%%/img/report-foldable-icon.svg" alt="icon to trigger folding of the section" width="13" height="6"/>
+                          <img class="foldable-icon" src="/static/hash-%%etag%%/img/report-foldable-icon.svg" alt="trigger folding of the section" width="13" height="6"/>
                         </div>
                       </div>
                       <div class="foldable-content">
diff --git a/app/test/frontend/golden/pkg_show_page.html b/app/test/frontend/golden/pkg_show_page.html
index f03e3b63e0..34764a87c1 100644
--- a/app/test/frontend/golden/pkg_show_page.html
+++ b/app/test/frontend/golden/pkg_show_page.html
@@ -76,7 +76,7 @@ <h3>Dart</h3>
         <div class="nav-container nav-help-container-mobile foldable">
           <h3 class="foldable-button">
             Pub.dev
-            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="icon to toggle folding of the section" width="13" height="6"/>
+            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="toggle folding of the section" width="13" height="6"/>
           </h3>
           <div class="foldable-content">
             <a class="nav-link" href="/help/search" rel="noopener" target="_blank">Searching for packages</a>
@@ -86,7 +86,7 @@ <h3 class="foldable-button">
         <div class="nav-container nav-help-container-mobile foldable">
           <h3 class="foldable-button">
             Flutter
-            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="icon to toggle folding of the section" width="13" height="6"/>
+            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="toggle folding of the section" width="13" height="6"/>
           </h3>
           <div class="foldable-content">
             <a class="nav-link" href="https://flutter.dev/using-packages/" rel="noopener" target="_blank">Using packages</a>
@@ -97,7 +97,7 @@ <h3 class="foldable-button">
         <div class="nav-container nav-help-container-mobile foldable">
           <h3 class="foldable-button">
             Dart
-            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="icon to toggle folding of the section" width="13" height="6"/>
+            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="toggle folding of the section" width="13" height="6"/>
           </h3>
           <div class="foldable-content">
             <a class="nav-link" href="https://dart.dev/guides/packages" rel="noopener" target="_blank">Using packages</a>
diff --git a/app/test/frontend/golden/pkg_show_page_discontinued.html b/app/test/frontend/golden/pkg_show_page_discontinued.html
index e354231d82..b0fe200761 100644
--- a/app/test/frontend/golden/pkg_show_page_discontinued.html
+++ b/app/test/frontend/golden/pkg_show_page_discontinued.html
@@ -76,7 +76,7 @@ <h3>Dart</h3>
         <div class="nav-container nav-help-container-mobile foldable">
           <h3 class="foldable-button">
             Pub.dev
-            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="icon to toggle folding of the section" width="13" height="6"/>
+            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="toggle folding of the section" width="13" height="6"/>
           </h3>
           <div class="foldable-content">
             <a class="nav-link" href="/help/search" rel="noopener" target="_blank">Searching for packages</a>
@@ -86,7 +86,7 @@ <h3 class="foldable-button">
         <div class="nav-container nav-help-container-mobile foldable">
           <h3 class="foldable-button">
             Flutter
-            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="icon to toggle folding of the section" width="13" height="6"/>
+            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="toggle folding of the section" width="13" height="6"/>
           </h3>
           <div class="foldable-content">
             <a class="nav-link" href="https://flutter.dev/using-packages/" rel="noopener" target="_blank">Using packages</a>
@@ -97,7 +97,7 @@ <h3 class="foldable-button">
         <div class="nav-container nav-help-container-mobile foldable">
           <h3 class="foldable-button">
             Dart
-            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="icon to toggle folding of the section" width="13" height="6"/>
+            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="toggle folding of the section" width="13" height="6"/>
           </h3>
           <div class="foldable-content">
             <a class="nav-link" href="https://dart.dev/guides/packages" rel="noopener" target="_blank">Using packages</a>
diff --git a/app/test/frontend/golden/pkg_show_page_flutter_plugin.html b/app/test/frontend/golden/pkg_show_page_flutter_plugin.html
index 546fb3125e..eee5010a90 100644
--- a/app/test/frontend/golden/pkg_show_page_flutter_plugin.html
+++ b/app/test/frontend/golden/pkg_show_page_flutter_plugin.html
@@ -76,7 +76,7 @@ <h3>Dart</h3>
         <div class="nav-container nav-help-container-mobile foldable">
           <h3 class="foldable-button">
             Pub.dev
-            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="icon to toggle folding of the section" width="13" height="6"/>
+            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="toggle folding of the section" width="13" height="6"/>
           </h3>
           <div class="foldable-content">
             <a class="nav-link" href="/help/search" rel="noopener" target="_blank">Searching for packages</a>
@@ -86,7 +86,7 @@ <h3 class="foldable-button">
         <div class="nav-container nav-help-container-mobile foldable">
           <h3 class="foldable-button">
             Flutter
-            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="icon to toggle folding of the section" width="13" height="6"/>
+            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="toggle folding of the section" width="13" height="6"/>
           </h3>
           <div class="foldable-content">
             <a class="nav-link" href="https://flutter.dev/using-packages/" rel="noopener" target="_blank">Using packages</a>
@@ -97,7 +97,7 @@ <h3 class="foldable-button">
         <div class="nav-container nav-help-container-mobile foldable">
           <h3 class="foldable-button">
             Dart
-            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="icon to toggle folding of the section" width="13" height="6"/>
+            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="toggle folding of the section" width="13" height="6"/>
           </h3>
           <div class="foldable-content">
             <a class="nav-link" href="https://dart.dev/guides/packages" rel="noopener" target="_blank">Using packages</a>
diff --git a/app/test/frontend/golden/pkg_show_page_publisher.html b/app/test/frontend/golden/pkg_show_page_publisher.html
index eb7e178b43..c8be5f0e98 100644
--- a/app/test/frontend/golden/pkg_show_page_publisher.html
+++ b/app/test/frontend/golden/pkg_show_page_publisher.html
@@ -76,7 +76,7 @@ <h3>Dart</h3>
         <div class="nav-container nav-help-container-mobile foldable">
           <h3 class="foldable-button">
             Pub.dev
-            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="icon to toggle folding of the section" width="13" height="6"/>
+            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="toggle folding of the section" width="13" height="6"/>
           </h3>
           <div class="foldable-content">
             <a class="nav-link" href="/help/search" rel="noopener" target="_blank">Searching for packages</a>
@@ -86,7 +86,7 @@ <h3 class="foldable-button">
         <div class="nav-container nav-help-container-mobile foldable">
           <h3 class="foldable-button">
             Flutter
-            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="icon to toggle folding of the section" width="13" height="6"/>
+            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="toggle folding of the section" width="13" height="6"/>
           </h3>
           <div class="foldable-content">
             <a class="nav-link" href="https://flutter.dev/using-packages/" rel="noopener" target="_blank">Using packages</a>
@@ -97,7 +97,7 @@ <h3 class="foldable-button">
         <div class="nav-container nav-help-container-mobile foldable">
           <h3 class="foldable-button">
             Dart
-            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="icon to toggle folding of the section" width="13" height="6"/>
+            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="toggle folding of the section" width="13" height="6"/>
           </h3>
           <div class="foldable-content">
             <a class="nav-link" href="https://dart.dev/guides/packages" rel="noopener" target="_blank">Using packages</a>
diff --git a/app/test/frontend/golden/pkg_show_page_retracted.html b/app/test/frontend/golden/pkg_show_page_retracted.html
index f7276c5b82..96467f9691 100644
--- a/app/test/frontend/golden/pkg_show_page_retracted.html
+++ b/app/test/frontend/golden/pkg_show_page_retracted.html
@@ -76,7 +76,7 @@ <h3>Dart</h3>
         <div class="nav-container nav-help-container-mobile foldable">
           <h3 class="foldable-button">
             Pub.dev
-            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="icon to toggle folding of the section" width="13" height="6"/>
+            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="toggle folding of the section" width="13" height="6"/>
           </h3>
           <div class="foldable-content">
             <a class="nav-link" href="/help/search" rel="noopener" target="_blank">Searching for packages</a>
@@ -86,7 +86,7 @@ <h3 class="foldable-button">
         <div class="nav-container nav-help-container-mobile foldable">
           <h3 class="foldable-button">
             Flutter
-            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="icon to toggle folding of the section" width="13" height="6"/>
+            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="toggle folding of the section" width="13" height="6"/>
           </h3>
           <div class="foldable-content">
             <a class="nav-link" href="https://flutter.dev/using-packages/" rel="noopener" target="_blank">Using packages</a>
@@ -97,7 +97,7 @@ <h3 class="foldable-button">
         <div class="nav-container nav-help-container-mobile foldable">
           <h3 class="foldable-button">
             Dart
-            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="icon to toggle folding of the section" width="13" height="6"/>
+            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="toggle folding of the section" width="13" height="6"/>
           </h3>
           <div class="foldable-content">
             <a class="nav-link" href="https://dart.dev/guides/packages" rel="noopener" target="_blank">Using packages</a>
diff --git a/app/test/frontend/golden/pkg_show_page_retracted_non_retracted_version.html b/app/test/frontend/golden/pkg_show_page_retracted_non_retracted_version.html
index 75f87aba1f..033dc49aff 100644
--- a/app/test/frontend/golden/pkg_show_page_retracted_non_retracted_version.html
+++ b/app/test/frontend/golden/pkg_show_page_retracted_non_retracted_version.html
@@ -76,7 +76,7 @@ <h3>Dart</h3>
         <div class="nav-container nav-help-container-mobile foldable">
           <h3 class="foldable-button">
             Pub.dev
-            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="icon to toggle folding of the section" width="13" height="6"/>
+            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="toggle folding of the section" width="13" height="6"/>
           </h3>
           <div class="foldable-content">
             <a class="nav-link" href="/help/search" rel="noopener" target="_blank">Searching for packages</a>
@@ -86,7 +86,7 @@ <h3 class="foldable-button">
         <div class="nav-container nav-help-container-mobile foldable">
           <h3 class="foldable-button">
             Flutter
-            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="icon to toggle folding of the section" width="13" height="6"/>
+            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="toggle folding of the section" width="13" height="6"/>
           </h3>
           <div class="foldable-content">
             <a class="nav-link" href="https://flutter.dev/using-packages/" rel="noopener" target="_blank">Using packages</a>
@@ -97,7 +97,7 @@ <h3 class="foldable-button">
         <div class="nav-container nav-help-container-mobile foldable">
           <h3 class="foldable-button">
             Dart
-            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="icon to toggle folding of the section" width="13" height="6"/>
+            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="toggle folding of the section" width="13" height="6"/>
           </h3>
           <div class="foldable-content">
             <a class="nav-link" href="https://dart.dev/guides/packages" rel="noopener" target="_blank">Using packages</a>
diff --git a/app/test/frontend/golden/pkg_show_version_page.html b/app/test/frontend/golden/pkg_show_version_page.html
index 2fd27c1932..ba166cf086 100644
--- a/app/test/frontend/golden/pkg_show_version_page.html
+++ b/app/test/frontend/golden/pkg_show_version_page.html
@@ -76,7 +76,7 @@ <h3>Dart</h3>
         <div class="nav-container nav-help-container-mobile foldable">
           <h3 class="foldable-button">
             Pub.dev
-            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="icon to toggle folding of the section" width="13" height="6"/>
+            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="toggle folding of the section" width="13" height="6"/>
           </h3>
           <div class="foldable-content">
             <a class="nav-link" href="/help/search" rel="noopener" target="_blank">Searching for packages</a>
@@ -86,7 +86,7 @@ <h3 class="foldable-button">
         <div class="nav-container nav-help-container-mobile foldable">
           <h3 class="foldable-button">
             Flutter
-            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="icon to toggle folding of the section" width="13" height="6"/>
+            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="toggle folding of the section" width="13" height="6"/>
           </h3>
           <div class="foldable-content">
             <a class="nav-link" href="https://flutter.dev/using-packages/" rel="noopener" target="_blank">Using packages</a>
@@ -97,7 +97,7 @@ <h3 class="foldable-button">
         <div class="nav-container nav-help-container-mobile foldable">
           <h3 class="foldable-button">
             Dart
-            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="icon to toggle folding of the section" width="13" height="6"/>
+            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="toggle folding of the section" width="13" height="6"/>
           </h3>
           <div class="foldable-content">
             <a class="nav-link" href="https://dart.dev/guides/packages" rel="noopener" target="_blank">Using packages</a>
diff --git a/app/test/frontend/golden/pkg_versions_page.html b/app/test/frontend/golden/pkg_versions_page.html
index 88dc977e85..89431d6a93 100644
--- a/app/test/frontend/golden/pkg_versions_page.html
+++ b/app/test/frontend/golden/pkg_versions_page.html
@@ -76,7 +76,7 @@ <h3>Dart</h3>
         <div class="nav-container nav-help-container-mobile foldable">
           <h3 class="foldable-button">
             Pub.dev
-            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="icon to toggle folding of the section" width="13" height="6"/>
+            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="toggle folding of the section" width="13" height="6"/>
           </h3>
           <div class="foldable-content">
             <a class="nav-link" href="/help/search" rel="noopener" target="_blank">Searching for packages</a>
@@ -86,7 +86,7 @@ <h3 class="foldable-button">
         <div class="nav-container nav-help-container-mobile foldable">
           <h3 class="foldable-button">
             Flutter
-            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="icon to toggle folding of the section" width="13" height="6"/>
+            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="toggle folding of the section" width="13" height="6"/>
           </h3>
           <div class="foldable-content">
             <a class="nav-link" href="https://flutter.dev/using-packages/" rel="noopener" target="_blank">Using packages</a>
@@ -97,7 +97,7 @@ <h3 class="foldable-button">
         <div class="nav-container nav-help-container-mobile foldable">
           <h3 class="foldable-button">
             Dart
-            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="icon to toggle folding of the section" width="13" height="6"/>
+            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="toggle folding of the section" width="13" height="6"/>
           </h3>
           <div class="foldable-content">
             <a class="nav-link" href="https://dart.dev/guides/packages" rel="noopener" target="_blank">Using packages</a>
diff --git a/app/test/frontend/golden/publisher_activity_log_page.html b/app/test/frontend/golden/publisher_activity_log_page.html
index 671e734e93..252d20fe32 100644
--- a/app/test/frontend/golden/publisher_activity_log_page.html
+++ b/app/test/frontend/golden/publisher_activity_log_page.html
@@ -70,7 +70,7 @@ <h3>Dart</h3>
         <div class="nav-container nav-help-container-mobile foldable">
           <h3 class="foldable-button">
             Pub.dev
-            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="icon to toggle folding of the section" width="13" height="6"/>
+            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="toggle folding of the section" width="13" height="6"/>
           </h3>
           <div class="foldable-content">
             <a class="nav-link" href="/help/search" rel="noopener" target="_blank">Searching for packages</a>
@@ -80,7 +80,7 @@ <h3 class="foldable-button">
         <div class="nav-container nav-help-container-mobile foldable">
           <h3 class="foldable-button">
             Flutter
-            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="icon to toggle folding of the section" width="13" height="6"/>
+            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="toggle folding of the section" width="13" height="6"/>
           </h3>
           <div class="foldable-content">
             <a class="nav-link" href="https://flutter.dev/using-packages/" rel="noopener" target="_blank">Using packages</a>
@@ -91,7 +91,7 @@ <h3 class="foldable-button">
         <div class="nav-container nav-help-container-mobile foldable">
           <h3 class="foldable-button">
             Dart
-            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="icon to toggle folding of the section" width="13" height="6"/>
+            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="toggle folding of the section" width="13" height="6"/>
           </h3>
           <div class="foldable-content">
             <a class="nav-link" href="https://dart.dev/guides/packages" rel="noopener" target="_blank">Using packages</a>
diff --git a/app/test/frontend/golden/publisher_admin_page.html b/app/test/frontend/golden/publisher_admin_page.html
index 40e4749265..8387d9c234 100644
--- a/app/test/frontend/golden/publisher_admin_page.html
+++ b/app/test/frontend/golden/publisher_admin_page.html
@@ -70,7 +70,7 @@ <h3>Dart</h3>
         <div class="nav-container nav-help-container-mobile foldable">
           <h3 class="foldable-button">
             Pub.dev
-            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="icon to toggle folding of the section" width="13" height="6"/>
+            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="toggle folding of the section" width="13" height="6"/>
           </h3>
           <div class="foldable-content">
             <a class="nav-link" href="/help/search" rel="noopener" target="_blank">Searching for packages</a>
@@ -80,7 +80,7 @@ <h3 class="foldable-button">
         <div class="nav-container nav-help-container-mobile foldable">
           <h3 class="foldable-button">
             Flutter
-            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="icon to toggle folding of the section" width="13" height="6"/>
+            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="toggle folding of the section" width="13" height="6"/>
           </h3>
           <div class="foldable-content">
             <a class="nav-link" href="https://flutter.dev/using-packages/" rel="noopener" target="_blank">Using packages</a>
@@ -91,7 +91,7 @@ <h3 class="foldable-button">
         <div class="nav-container nav-help-container-mobile foldable">
           <h3 class="foldable-button">
             Dart
-            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="icon to toggle folding of the section" width="13" height="6"/>
+            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="toggle folding of the section" width="13" height="6"/>
           </h3>
           <div class="foldable-content">
             <a class="nav-link" href="https://dart.dev/guides/packages" rel="noopener" target="_blank">Using packages</a>
diff --git a/app/test/frontend/golden/publisher_list_page.html b/app/test/frontend/golden/publisher_list_page.html
index e4f12f401e..3a151ccdda 100644
--- a/app/test/frontend/golden/publisher_list_page.html
+++ b/app/test/frontend/golden/publisher_list_page.html
@@ -69,7 +69,7 @@ <h3>Dart</h3>
         <div class="nav-container nav-help-container-mobile foldable">
           <h3 class="foldable-button">
             Pub.dev
-            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="icon to toggle folding of the section" width="13" height="6"/>
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@@ -79,7 +79,7 @@ <h3 class="foldable-button">
         <div class="nav-container nav-help-container-mobile foldable">
           <h3 class="foldable-button">
             Flutter
-            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="icon to toggle folding of the section" width="13" height="6"/>
+            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="toggle folding of the section" width="13" height="6"/>
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             <a class="nav-link" href="https://flutter.dev/using-packages/" rel="noopener" target="_blank">Using packages</a>
@@ -90,7 +90,7 @@ <h3 class="foldable-button">
         <div class="nav-container nav-help-container-mobile foldable">
           <h3 class="foldable-button">
             Dart
-            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="icon to toggle folding of the section" width="13" height="6"/>
+            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="toggle folding of the section" width="13" height="6"/>
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           <div class="foldable-content">
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@@ -106,8 +106,8 @@ <h3 class="foldable-button">
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-            <img class="search-filters-btn search-filters-btn-active" src="/static/hash-%%etag%%/img/search-filters-active.svg" alt="icon to toggle the display of search filters (active)" width="42" height="42"/>
+            <img class="search-filters-btn search-filters-btn-inactive" src="/static/hash-%%etag%%/img/search-filters-inactive.svg" alt="toggle the display of search filters (inactive)" width="42" height="42"/>
+            <img class="search-filters-btn search-filters-btn-active" src="/static/hash-%%etag%%/img/search-filters-active.svg" alt="toggle the display of search filters (active)" width="42" height="42"/>
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         </form>
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diff --git a/app/test/frontend/golden/publisher_packages_page.html b/app/test/frontend/golden/publisher_packages_page.html
index 75963e8073..a3e8fcf00f 100644
--- a/app/test/frontend/golden/publisher_packages_page.html
+++ b/app/test/frontend/golden/publisher_packages_page.html
@@ -70,7 +70,7 @@ <h3>Dart</h3>
         <div class="nav-container nav-help-container-mobile foldable">
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             Pub.dev
-            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="icon to toggle folding of the section" width="13" height="6"/>
+            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="toggle folding of the section" width="13" height="6"/>
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           <div class="foldable-content">
             <a class="nav-link" href="/help/search" rel="noopener" target="_blank">Searching for packages</a>
@@ -80,7 +80,7 @@ <h3 class="foldable-button">
         <div class="nav-container nav-help-container-mobile foldable">
           <h3 class="foldable-button">
             Flutter
-            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="icon to toggle folding of the section" width="13" height="6"/>
+            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="toggle folding of the section" width="13" height="6"/>
           </h3>
           <div class="foldable-content">
             <a class="nav-link" href="https://flutter.dev/using-packages/" rel="noopener" target="_blank">Using packages</a>
@@ -91,7 +91,7 @@ <h3 class="foldable-button">
         <div class="nav-container nav-help-container-mobile foldable">
           <h3 class="foldable-button">
             Dart
-            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="icon to toggle folding of the section" width="13" height="6"/>
+            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="toggle folding of the section" width="13" height="6"/>
           </h3>
           <div class="foldable-content">
             <a class="nav-link" href="https://dart.dev/guides/packages" rel="noopener" target="_blank">Using packages</a>
diff --git a/app/test/frontend/golden/publisher_unlisted_packages_page.html b/app/test/frontend/golden/publisher_unlisted_packages_page.html
index 6ddb5d14ba..f174c88468 100644
--- a/app/test/frontend/golden/publisher_unlisted_packages_page.html
+++ b/app/test/frontend/golden/publisher_unlisted_packages_page.html
@@ -70,7 +70,7 @@ <h3>Dart</h3>
         <div class="nav-container nav-help-container-mobile foldable">
           <h3 class="foldable-button">
             Pub.dev
-            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="icon to toggle folding of the section" width="13" height="6"/>
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           <div class="foldable-content">
             <a class="nav-link" href="/help/search" rel="noopener" target="_blank">Searching for packages</a>
@@ -80,7 +80,7 @@ <h3 class="foldable-button">
         <div class="nav-container nav-help-container-mobile foldable">
           <h3 class="foldable-button">
             Flutter
-            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="icon to toggle folding of the section" width="13" height="6"/>
+            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="toggle folding of the section" width="13" height="6"/>
           </h3>
           <div class="foldable-content">
             <a class="nav-link" href="https://flutter.dev/using-packages/" rel="noopener" target="_blank">Using packages</a>
@@ -91,7 +91,7 @@ <h3 class="foldable-button">
         <div class="nav-container nav-help-container-mobile foldable">
           <h3 class="foldable-button">
             Dart
-            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="icon to toggle folding of the section" width="13" height="6"/>
+            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="toggle folding of the section" width="13" height="6"/>
           </h3>
           <div class="foldable-content">
             <a class="nav-link" href="https://dart.dev/guides/packages" rel="noopener" target="_blank">Using packages</a>
diff --git a/app/test/frontend/golden/search_page.html b/app/test/frontend/golden/search_page.html
index e57f1309ac..def0e70cca 100644
--- a/app/test/frontend/golden/search_page.html
+++ b/app/test/frontend/golden/search_page.html
@@ -69,7 +69,7 @@ <h3>Dart</h3>
         <div class="nav-container nav-help-container-mobile foldable">
           <h3 class="foldable-button">
             Pub.dev
-            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="icon to toggle folding of the section" width="13" height="6"/>
+            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="toggle folding of the section" width="13" height="6"/>
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           <div class="foldable-content">
             <a class="nav-link" href="/help/search" rel="noopener" target="_blank">Searching for packages</a>
@@ -79,7 +79,7 @@ <h3 class="foldable-button">
         <div class="nav-container nav-help-container-mobile foldable">
           <h3 class="foldable-button">
             Flutter
-            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="icon to toggle folding of the section" width="13" height="6"/>
+            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="toggle folding of the section" width="13" height="6"/>
           </h3>
           <div class="foldable-content">
             <a class="nav-link" href="https://flutter.dev/using-packages/" rel="noopener" target="_blank">Using packages</a>
@@ -90,7 +90,7 @@ <h3 class="foldable-button">
         <div class="nav-container nav-help-container-mobile foldable">
           <h3 class="foldable-button">
             Dart
-            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="icon to toggle folding of the section" width="13" height="6"/>
+            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="toggle folding of the section" width="13" height="6"/>
           </h3>
           <div class="foldable-content">
             <a class="nav-link" href="https://dart.dev/guides/packages" rel="noopener" target="_blank">Using packages</a>
@@ -106,8 +106,8 @@ <h3 class="foldable-button">
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           <span class="icon"></span>
           <div class="search-filters-btn-wrapper">
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-            <img class="search-filters-btn search-filters-btn-active" src="/static/hash-%%etag%%/img/search-filters-active.svg" alt="icon to toggle the display of search filters (active)" width="42" height="42"/>
+            <img class="search-filters-btn search-filters-btn-inactive" src="/static/hash-%%etag%%/img/search-filters-inactive.svg" alt="toggle the display of search filters (inactive)" width="42" height="42"/>
+            <img class="search-filters-btn search-filters-btn-active" src="/static/hash-%%etag%%/img/search-filters-active.svg" alt="toggle the display of search filters (active)" width="42" height="42"/>
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diff --git a/app/test/frontend/golden/topics_page.html b/app/test/frontend/golden/topics_page.html
index ef6c3e319c..8859534d8e 100644
--- a/app/test/frontend/golden/topics_page.html
+++ b/app/test/frontend/golden/topics_page.html
@@ -74,7 +74,7 @@ <h3>Dart</h3>
         <div class="nav-container nav-help-container-mobile foldable">
           <h3 class="foldable-button">
             Pub.dev
-            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="icon to toggle folding of the section" width="13" height="6"/>
+            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="toggle folding of the section" width="13" height="6"/>
           </h3>
           <div class="foldable-content">
             <a class="nav-link" href="/help/search" rel="noopener" target="_blank">Searching for packages</a>
@@ -84,7 +84,7 @@ <h3 class="foldable-button">
         <div class="nav-container nav-help-container-mobile foldable">
           <h3 class="foldable-button">
             Flutter
-            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="icon to toggle folding of the section" width="13" height="6"/>
+            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="toggle folding of the section" width="13" height="6"/>
           </h3>
           <div class="foldable-content">
             <a class="nav-link" href="https://flutter.dev/using-packages/" rel="noopener" target="_blank">Using packages</a>
@@ -95,7 +95,7 @@ <h3 class="foldable-button">
         <div class="nav-container nav-help-container-mobile foldable">
           <h3 class="foldable-button">
             Dart
-            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="icon to toggle folding of the section" width="13" height="6"/>
+            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="toggle folding of the section" width="13" height="6"/>
           </h3>
           <div class="foldable-content">
             <a class="nav-link" href="https://dart.dev/guides/packages" rel="noopener" target="_blank">Using packages</a>
diff --git a/app/test/task/testdata/goldens/packages/oxygen.html b/app/test/task/testdata/goldens/packages/oxygen.html
index 4dc5277b78..baa1787363 100644
--- a/app/test/task/testdata/goldens/packages/oxygen.html
+++ b/app/test/task/testdata/goldens/packages/oxygen.html
@@ -76,7 +76,7 @@ <h3>Dart</h3>
         <div class="nav-container nav-help-container-mobile foldable">
           <h3 class="foldable-button">
             Pub.dev
-            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="icon to toggle folding of the section" width="13" height="6"/>
+            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="toggle folding of the section" width="13" height="6"/>
           </h3>
           <div class="foldable-content">
             <a class="nav-link" href="/help/search" rel="noopener" target="_blank">Searching for packages</a>
@@ -86,7 +86,7 @@ <h3 class="foldable-button">
         <div class="nav-container nav-help-container-mobile foldable">
           <h3 class="foldable-button">
             Flutter
-            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="icon to toggle folding of the section" width="13" height="6"/>
+            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="toggle folding of the section" width="13" height="6"/>
           </h3>
           <div class="foldable-content">
             <a class="nav-link" href="https://flutter.dev/using-packages/" rel="noopener" target="_blank">Using packages</a>
@@ -97,7 +97,7 @@ <h3 class="foldable-button">
         <div class="nav-container nav-help-container-mobile foldable">
           <h3 class="foldable-button">
             Dart
-            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="icon to toggle folding of the section" width="13" height="6"/>
+            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="toggle folding of the section" width="13" height="6"/>
           </h3>
           <div class="foldable-content">
             <a class="nav-link" href="https://dart.dev/guides/packages" rel="noopener" target="_blank">Using packages</a>
diff --git a/app/test/task/testdata/goldens/packages/oxygen/changelog.html b/app/test/task/testdata/goldens/packages/oxygen/changelog.html
index 747008fcda..ada8c067b8 100644
--- a/app/test/task/testdata/goldens/packages/oxygen/changelog.html
+++ b/app/test/task/testdata/goldens/packages/oxygen/changelog.html
@@ -76,7 +76,7 @@ <h3>Dart</h3>
         <div class="nav-container nav-help-container-mobile foldable">
           <h3 class="foldable-button">
             Pub.dev
-            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="icon to toggle folding of the section" width="13" height="6"/>
+            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="toggle folding of the section" width="13" height="6"/>
           </h3>
           <div class="foldable-content">
             <a class="nav-link" href="/help/search" rel="noopener" target="_blank">Searching for packages</a>
@@ -86,7 +86,7 @@ <h3 class="foldable-button">
         <div class="nav-container nav-help-container-mobile foldable">
           <h3 class="foldable-button">
             Flutter
-            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="icon to toggle folding of the section" width="13" height="6"/>
+            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="toggle folding of the section" width="13" height="6"/>
           </h3>
           <div class="foldable-content">
             <a class="nav-link" href="https://flutter.dev/using-packages/" rel="noopener" target="_blank">Using packages</a>
@@ -97,7 +97,7 @@ <h3 class="foldable-button">
         <div class="nav-container nav-help-container-mobile foldable">
           <h3 class="foldable-button">
             Dart
-            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="icon to toggle folding of the section" width="13" height="6"/>
+            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="toggle folding of the section" width="13" height="6"/>
           </h3>
           <div class="foldable-content">
             <a class="nav-link" href="https://dart.dev/guides/packages" rel="noopener" target="_blank">Using packages</a>
diff --git a/app/test/task/testdata/goldens/packages/oxygen/example.html b/app/test/task/testdata/goldens/packages/oxygen/example.html
index 7748f3c227..0b22df086a 100644
--- a/app/test/task/testdata/goldens/packages/oxygen/example.html
+++ b/app/test/task/testdata/goldens/packages/oxygen/example.html
@@ -76,7 +76,7 @@ <h3>Dart</h3>
         <div class="nav-container nav-help-container-mobile foldable">
           <h3 class="foldable-button">
             Pub.dev
-            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="icon to toggle folding of the section" width="13" height="6"/>
+            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="toggle folding of the section" width="13" height="6"/>
           </h3>
           <div class="foldable-content">
             <a class="nav-link" href="/help/search" rel="noopener" target="_blank">Searching for packages</a>
@@ -86,7 +86,7 @@ <h3 class="foldable-button">
         <div class="nav-container nav-help-container-mobile foldable">
           <h3 class="foldable-button">
             Flutter
-            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="icon to toggle folding of the section" width="13" height="6"/>
+            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="toggle folding of the section" width="13" height="6"/>
           </h3>
           <div class="foldable-content">
             <a class="nav-link" href="https://flutter.dev/using-packages/" rel="noopener" target="_blank">Using packages</a>
@@ -97,7 +97,7 @@ <h3 class="foldable-button">
         <div class="nav-container nav-help-container-mobile foldable">
           <h3 class="foldable-button">
             Dart
-            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="icon to toggle folding of the section" width="13" height="6"/>
+            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="toggle folding of the section" width="13" height="6"/>
           </h3>
           <div class="foldable-content">
             <a class="nav-link" href="https://dart.dev/guides/packages" rel="noopener" target="_blank">Using packages</a>
diff --git a/app/test/task/testdata/goldens/packages/oxygen/install.html b/app/test/task/testdata/goldens/packages/oxygen/install.html
index 91184e8b03..6db950c587 100644
--- a/app/test/task/testdata/goldens/packages/oxygen/install.html
+++ b/app/test/task/testdata/goldens/packages/oxygen/install.html
@@ -76,7 +76,7 @@ <h3>Dart</h3>
         <div class="nav-container nav-help-container-mobile foldable">
           <h3 class="foldable-button">
             Pub.dev
-            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="icon to toggle folding of the section" width="13" height="6"/>
+            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="toggle folding of the section" width="13" height="6"/>
           </h3>
           <div class="foldable-content">
             <a class="nav-link" href="/help/search" rel="noopener" target="_blank">Searching for packages</a>
@@ -86,7 +86,7 @@ <h3 class="foldable-button">
         <div class="nav-container nav-help-container-mobile foldable">
           <h3 class="foldable-button">
             Flutter
-            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="icon to toggle folding of the section" width="13" height="6"/>
+            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="toggle folding of the section" width="13" height="6"/>
           </h3>
           <div class="foldable-content">
             <a class="nav-link" href="https://flutter.dev/using-packages/" rel="noopener" target="_blank">Using packages</a>
@@ -97,7 +97,7 @@ <h3 class="foldable-button">
         <div class="nav-container nav-help-container-mobile foldable">
           <h3 class="foldable-button">
             Dart
-            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="icon to toggle folding of the section" width="13" height="6"/>
+            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="toggle folding of the section" width="13" height="6"/>
           </h3>
           <div class="foldable-content">
             <a class="nav-link" href="https://dart.dev/guides/packages" rel="noopener" target="_blank">Using packages</a>
diff --git a/app/test/task/testdata/goldens/packages/oxygen/license.html b/app/test/task/testdata/goldens/packages/oxygen/license.html
index 214ea56773..d91fb119e5 100644
--- a/app/test/task/testdata/goldens/packages/oxygen/license.html
+++ b/app/test/task/testdata/goldens/packages/oxygen/license.html
@@ -76,7 +76,7 @@ <h3>Dart</h3>
         <div class="nav-container nav-help-container-mobile foldable">
           <h3 class="foldable-button">
             Pub.dev
-            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="icon to toggle folding of the section" width="13" height="6"/>
+            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="toggle folding of the section" width="13" height="6"/>
           </h3>
           <div class="foldable-content">
             <a class="nav-link" href="/help/search" rel="noopener" target="_blank">Searching for packages</a>
@@ -86,7 +86,7 @@ <h3 class="foldable-button">
         <div class="nav-container nav-help-container-mobile foldable">
           <h3 class="foldable-button">
             Flutter
-            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="icon to toggle folding of the section" width="13" height="6"/>
+            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="toggle folding of the section" width="13" height="6"/>
           </h3>
           <div class="foldable-content">
             <a class="nav-link" href="https://flutter.dev/using-packages/" rel="noopener" target="_blank">Using packages</a>
@@ -97,7 +97,7 @@ <h3 class="foldable-button">
         <div class="nav-container nav-help-container-mobile foldable">
           <h3 class="foldable-button">
             Dart
-            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="icon to toggle folding of the section" width="13" height="6"/>
+            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="toggle folding of the section" width="13" height="6"/>
           </h3>
           <div class="foldable-content">
             <a class="nav-link" href="https://dart.dev/guides/packages" rel="noopener" target="_blank">Using packages</a>
diff --git a/app/test/task/testdata/goldens/packages/oxygen/score.html b/app/test/task/testdata/goldens/packages/oxygen/score.html
index ac5e8358ea..0a799538e4 100644
--- a/app/test/task/testdata/goldens/packages/oxygen/score.html
+++ b/app/test/task/testdata/goldens/packages/oxygen/score.html
@@ -76,7 +76,7 @@ <h3>Dart</h3>
         <div class="nav-container nav-help-container-mobile foldable">
           <h3 class="foldable-button">
             Pub.dev
-            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="icon to toggle folding of the section" width="13" height="6"/>
+            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="toggle folding of the section" width="13" height="6"/>
           </h3>
           <div class="foldable-content">
             <a class="nav-link" href="/help/search" rel="noopener" target="_blank">Searching for packages</a>
@@ -86,7 +86,7 @@ <h3 class="foldable-button">
         <div class="nav-container nav-help-container-mobile foldable">
           <h3 class="foldable-button">
             Flutter
-            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="icon to toggle folding of the section" width="13" height="6"/>
+            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="toggle folding of the section" width="13" height="6"/>
           </h3>
           <div class="foldable-content">
             <a class="nav-link" href="https://flutter.dev/using-packages/" rel="noopener" target="_blank">Using packages</a>
@@ -97,7 +97,7 @@ <h3 class="foldable-button">
         <div class="nav-container nav-help-container-mobile foldable">
           <h3 class="foldable-button">
             Dart
-            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="icon to toggle folding of the section" width="13" height="6"/>
+            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="toggle folding of the section" width="13" height="6"/>
           </h3>
           <div class="foldable-content">
             <a class="nav-link" href="https://dart.dev/guides/packages" rel="noopener" target="_blank">Using packages</a>
@@ -239,7 +239,7 @@ <h3 class="detail-lead-title">Metadata</h3>
                           <span class="pkg-report-header-score-granted">10</span>
                           /
                           <span class="pkg-report-header-score-max">30</span>
-                          <img class="foldable-icon" src="/static/hash-%%etag%%/img/report-foldable-icon.svg" alt="icon to trigger folding of the section" width="13" height="6"/>
+                          <img class="foldable-icon" src="/static/hash-%%etag%%/img/report-foldable-icon.svg" alt="trigger folding of the section" width="13" height="6"/>
                         </div>
                       </div>
                       <div class="foldable-content">
@@ -367,7 +367,7 @@ <h3>
                           <span class="pkg-report-header-score-granted">20</span>
                           /
                           <span class="pkg-report-header-score-max">20</span>
-                          <img class="foldable-icon" src="/static/hash-%%etag%%/img/report-foldable-icon.svg" alt="icon to trigger folding of the section" width="13" height="6"/>
+                          <img class="foldable-icon" src="/static/hash-%%etag%%/img/report-foldable-icon.svg" alt="trigger folding of the section" width="13" height="6"/>
                         </div>
                       </div>
                       <div class="foldable-content">
@@ -409,7 +409,7 @@ <h3>
                           <span class="pkg-report-header-score-granted">20</span>
                           /
                           <span class="pkg-report-header-score-max">20</span>
-                          <img class="foldable-icon" src="/static/hash-%%etag%%/img/report-foldable-icon.svg" alt="icon to trigger folding of the section" width="13" height="6"/>
+                          <img class="foldable-icon" src="/static/hash-%%etag%%/img/report-foldable-icon.svg" alt="trigger folding of the section" width="13" height="6"/>
                         </div>
                       </div>
                       <div class="foldable-content">
@@ -453,7 +453,7 @@ <h3>
                           <span class="pkg-report-header-score-granted">50</span>
                           /
                           <span class="pkg-report-header-score-max">50</span>
-                          <img class="foldable-icon" src="/static/hash-%%etag%%/img/report-foldable-icon.svg" alt="icon to trigger folding of the section" width="13" height="6"/>
+                          <img class="foldable-icon" src="/static/hash-%%etag%%/img/report-foldable-icon.svg" alt="trigger folding of the section" width="13" height="6"/>
                         </div>
                       </div>
                       <div class="foldable-content">
@@ -477,7 +477,7 @@ <h3>
                           <span class="pkg-report-header-score-granted">20</span>
                           /
                           <span class="pkg-report-header-score-max">20</span>
-                          <img class="foldable-icon" src="/static/hash-%%etag%%/img/report-foldable-icon.svg" alt="icon to trigger folding of the section" width="13" height="6"/>
+                          <img class="foldable-icon" src="/static/hash-%%etag%%/img/report-foldable-icon.svg" alt="trigger folding of the section" width="13" height="6"/>
                         </div>
                       </div>
                       <div class="foldable-content">
diff --git a/app/test/task/testdata/goldens/packages/oxygen/versions.html b/app/test/task/testdata/goldens/packages/oxygen/versions.html
index 293a715e2d..5f0428c43b 100644
--- a/app/test/task/testdata/goldens/packages/oxygen/versions.html
+++ b/app/test/task/testdata/goldens/packages/oxygen/versions.html
@@ -76,7 +76,7 @@ <h3>Dart</h3>
         <div class="nav-container nav-help-container-mobile foldable">
           <h3 class="foldable-button">
             Pub.dev
-            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="icon to toggle folding of the section" width="13" height="6"/>
+            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="toggle folding of the section" width="13" height="6"/>
           </h3>
           <div class="foldable-content">
             <a class="nav-link" href="/help/search" rel="noopener" target="_blank">Searching for packages</a>
@@ -86,7 +86,7 @@ <h3 class="foldable-button">
         <div class="nav-container nav-help-container-mobile foldable">
           <h3 class="foldable-button">
             Flutter
-            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="icon to toggle folding of the section" width="13" height="6"/>
+            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="toggle folding of the section" width="13" height="6"/>
           </h3>
           <div class="foldable-content">
             <a class="nav-link" href="https://flutter.dev/using-packages/" rel="noopener" target="_blank">Using packages</a>
@@ -97,7 +97,7 @@ <h3 class="foldable-button">
         <div class="nav-container nav-help-container-mobile foldable">
           <h3 class="foldable-button">
             Dart
-            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="icon to toggle folding of the section" width="13" height="6"/>
+            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="toggle folding of the section" width="13" height="6"/>
           </h3>
           <div class="foldable-content">
             <a class="nav-link" href="https://dart.dev/guides/packages" rel="noopener" target="_blank">Using packages</a>
diff --git a/app/test/task/testdata/goldens/packages/oxygen/versions/1.0.0.html b/app/test/task/testdata/goldens/packages/oxygen/versions/1.0.0.html
index 26dccd37fe..b52b472586 100644
--- a/app/test/task/testdata/goldens/packages/oxygen/versions/1.0.0.html
+++ b/app/test/task/testdata/goldens/packages/oxygen/versions/1.0.0.html
@@ -76,7 +76,7 @@ <h3>Dart</h3>
         <div class="nav-container nav-help-container-mobile foldable">
           <h3 class="foldable-button">
             Pub.dev
-            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="icon to toggle folding of the section" width="13" height="6"/>
+            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="toggle folding of the section" width="13" height="6"/>
           </h3>
           <div class="foldable-content">
             <a class="nav-link" href="/help/search" rel="noopener" target="_blank">Searching for packages</a>
@@ -86,7 +86,7 @@ <h3 class="foldable-button">
         <div class="nav-container nav-help-container-mobile foldable">
           <h3 class="foldable-button">
             Flutter
-            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="icon to toggle folding of the section" width="13" height="6"/>
+            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="toggle folding of the section" width="13" height="6"/>
           </h3>
           <div class="foldable-content">
             <a class="nav-link" href="https://flutter.dev/using-packages/" rel="noopener" target="_blank">Using packages</a>
@@ -97,7 +97,7 @@ <h3 class="foldable-button">
         <div class="nav-container nav-help-container-mobile foldable">
           <h3 class="foldable-button">
             Dart
-            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="icon to toggle folding of the section" width="13" height="6"/>
+            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="toggle folding of the section" width="13" height="6"/>
           </h3>
           <div class="foldable-content">
             <a class="nav-link" href="https://dart.dev/guides/packages" rel="noopener" target="_blank">Using packages</a>
diff --git a/app/test/task/testdata/goldens/packages/oxygen/versions/1.0.0/changelog.html b/app/test/task/testdata/goldens/packages/oxygen/versions/1.0.0/changelog.html
index 8a8f8ade42..1c3420e58c 100644
--- a/app/test/task/testdata/goldens/packages/oxygen/versions/1.0.0/changelog.html
+++ b/app/test/task/testdata/goldens/packages/oxygen/versions/1.0.0/changelog.html
@@ -76,7 +76,7 @@ <h3>Dart</h3>
         <div class="nav-container nav-help-container-mobile foldable">
           <h3 class="foldable-button">
             Pub.dev
-            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="icon to toggle folding of the section" width="13" height="6"/>
+            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="toggle folding of the section" width="13" height="6"/>
           </h3>
           <div class="foldable-content">
             <a class="nav-link" href="/help/search" rel="noopener" target="_blank">Searching for packages</a>
@@ -86,7 +86,7 @@ <h3 class="foldable-button">
         <div class="nav-container nav-help-container-mobile foldable">
           <h3 class="foldable-button">
             Flutter
-            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="icon to toggle folding of the section" width="13" height="6"/>
+            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="toggle folding of the section" width="13" height="6"/>
           </h3>
           <div class="foldable-content">
             <a class="nav-link" href="https://flutter.dev/using-packages/" rel="noopener" target="_blank">Using packages</a>
@@ -97,7 +97,7 @@ <h3 class="foldable-button">
         <div class="nav-container nav-help-container-mobile foldable">
           <h3 class="foldable-button">
             Dart
-            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="icon to toggle folding of the section" width="13" height="6"/>
+            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="toggle folding of the section" width="13" height="6"/>
           </h3>
           <div class="foldable-content">
             <a class="nav-link" href="https://dart.dev/guides/packages" rel="noopener" target="_blank">Using packages</a>
diff --git a/app/test/task/testdata/goldens/packages/oxygen/versions/1.0.0/example.html b/app/test/task/testdata/goldens/packages/oxygen/versions/1.0.0/example.html
index 72ae7d3b1f..6478648441 100644
--- a/app/test/task/testdata/goldens/packages/oxygen/versions/1.0.0/example.html
+++ b/app/test/task/testdata/goldens/packages/oxygen/versions/1.0.0/example.html
@@ -76,7 +76,7 @@ <h3>Dart</h3>
         <div class="nav-container nav-help-container-mobile foldable">
           <h3 class="foldable-button">
             Pub.dev
-            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="icon to toggle folding of the section" width="13" height="6"/>
+            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="toggle folding of the section" width="13" height="6"/>
           </h3>
           <div class="foldable-content">
             <a class="nav-link" href="/help/search" rel="noopener" target="_blank">Searching for packages</a>
@@ -86,7 +86,7 @@ <h3 class="foldable-button">
         <div class="nav-container nav-help-container-mobile foldable">
           <h3 class="foldable-button">
             Flutter
-            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="icon to toggle folding of the section" width="13" height="6"/>
+            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="toggle folding of the section" width="13" height="6"/>
           </h3>
           <div class="foldable-content">
             <a class="nav-link" href="https://flutter.dev/using-packages/" rel="noopener" target="_blank">Using packages</a>
@@ -97,7 +97,7 @@ <h3 class="foldable-button">
         <div class="nav-container nav-help-container-mobile foldable">
           <h3 class="foldable-button">
             Dart
-            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="icon to toggle folding of the section" width="13" height="6"/>
+            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="toggle folding of the section" width="13" height="6"/>
           </h3>
           <div class="foldable-content">
             <a class="nav-link" href="https://dart.dev/guides/packages" rel="noopener" target="_blank">Using packages</a>
diff --git a/app/test/task/testdata/goldens/packages/oxygen/versions/1.0.0/install.html b/app/test/task/testdata/goldens/packages/oxygen/versions/1.0.0/install.html
index b43b18bb3d..bff0059d1c 100644
--- a/app/test/task/testdata/goldens/packages/oxygen/versions/1.0.0/install.html
+++ b/app/test/task/testdata/goldens/packages/oxygen/versions/1.0.0/install.html
@@ -76,7 +76,7 @@ <h3>Dart</h3>
         <div class="nav-container nav-help-container-mobile foldable">
           <h3 class="foldable-button">
             Pub.dev
-            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="icon to toggle folding of the section" width="13" height="6"/>
+            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="toggle folding of the section" width="13" height="6"/>
           </h3>
           <div class="foldable-content">
             <a class="nav-link" href="/help/search" rel="noopener" target="_blank">Searching for packages</a>
@@ -86,7 +86,7 @@ <h3 class="foldable-button">
         <div class="nav-container nav-help-container-mobile foldable">
           <h3 class="foldable-button">
             Flutter
-            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="icon to toggle folding of the section" width="13" height="6"/>
+            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="toggle folding of the section" width="13" height="6"/>
           </h3>
           <div class="foldable-content">
             <a class="nav-link" href="https://flutter.dev/using-packages/" rel="noopener" target="_blank">Using packages</a>
@@ -97,7 +97,7 @@ <h3 class="foldable-button">
         <div class="nav-container nav-help-container-mobile foldable">
           <h3 class="foldable-button">
             Dart
-            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="icon to toggle folding of the section" width="13" height="6"/>
+            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="toggle folding of the section" width="13" height="6"/>
           </h3>
           <div class="foldable-content">
             <a class="nav-link" href="https://dart.dev/guides/packages" rel="noopener" target="_blank">Using packages</a>
diff --git a/app/test/task/testdata/goldens/packages/oxygen/versions/1.0.0/license.html b/app/test/task/testdata/goldens/packages/oxygen/versions/1.0.0/license.html
index 60f2744c4b..cefb005a8d 100644
--- a/app/test/task/testdata/goldens/packages/oxygen/versions/1.0.0/license.html
+++ b/app/test/task/testdata/goldens/packages/oxygen/versions/1.0.0/license.html
@@ -76,7 +76,7 @@ <h3>Dart</h3>
         <div class="nav-container nav-help-container-mobile foldable">
           <h3 class="foldable-button">
             Pub.dev
-            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="icon to toggle folding of the section" width="13" height="6"/>
+            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="toggle folding of the section" width="13" height="6"/>
           </h3>
           <div class="foldable-content">
             <a class="nav-link" href="/help/search" rel="noopener" target="_blank">Searching for packages</a>
@@ -86,7 +86,7 @@ <h3 class="foldable-button">
         <div class="nav-container nav-help-container-mobile foldable">
           <h3 class="foldable-button">
             Flutter
-            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="icon to toggle folding of the section" width="13" height="6"/>
+            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="toggle folding of the section" width="13" height="6"/>
           </h3>
           <div class="foldable-content">
             <a class="nav-link" href="https://flutter.dev/using-packages/" rel="noopener" target="_blank">Using packages</a>
@@ -97,7 +97,7 @@ <h3 class="foldable-button">
         <div class="nav-container nav-help-container-mobile foldable">
           <h3 class="foldable-button">
             Dart
-            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="icon to toggle folding of the section" width="13" height="6"/>
+            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="toggle folding of the section" width="13" height="6"/>
           </h3>
           <div class="foldable-content">
             <a class="nav-link" href="https://dart.dev/guides/packages" rel="noopener" target="_blank">Using packages</a>
diff --git a/app/test/task/testdata/goldens/packages/oxygen/versions/1.0.0/score.html b/app/test/task/testdata/goldens/packages/oxygen/versions/1.0.0/score.html
index a69d77e0f0..a86e6c19cb 100644
--- a/app/test/task/testdata/goldens/packages/oxygen/versions/1.0.0/score.html
+++ b/app/test/task/testdata/goldens/packages/oxygen/versions/1.0.0/score.html
@@ -76,7 +76,7 @@ <h3>Dart</h3>
         <div class="nav-container nav-help-container-mobile foldable">
           <h3 class="foldable-button">
             Pub.dev
-            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="icon to toggle folding of the section" width="13" height="6"/>
+            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="toggle folding of the section" width="13" height="6"/>
           </h3>
           <div class="foldable-content">
             <a class="nav-link" href="/help/search" rel="noopener" target="_blank">Searching for packages</a>
@@ -86,7 +86,7 @@ <h3 class="foldable-button">
         <div class="nav-container nav-help-container-mobile foldable">
           <h3 class="foldable-button">
             Flutter
-            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="icon to toggle folding of the section" width="13" height="6"/>
+            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="toggle folding of the section" width="13" height="6"/>
           </h3>
           <div class="foldable-content">
             <a class="nav-link" href="https://flutter.dev/using-packages/" rel="noopener" target="_blank">Using packages</a>
@@ -97,7 +97,7 @@ <h3 class="foldable-button">
         <div class="nav-container nav-help-container-mobile foldable">
           <h3 class="foldable-button">
             Dart
-            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="icon to toggle folding of the section" width="13" height="6"/>
+            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="toggle folding of the section" width="13" height="6"/>
           </h3>
           <div class="foldable-content">
             <a class="nav-link" href="https://dart.dev/guides/packages" rel="noopener" target="_blank">Using packages</a>
@@ -243,7 +243,7 @@ <h3 class="detail-lead-title">Metadata</h3>
                           <span class="pkg-report-header-score-granted">10</span>
                           /
                           <span class="pkg-report-header-score-max">30</span>
-                          <img class="foldable-icon" src="/static/hash-%%etag%%/img/report-foldable-icon.svg" alt="icon to trigger folding of the section" width="13" height="6"/>
+                          <img class="foldable-icon" src="/static/hash-%%etag%%/img/report-foldable-icon.svg" alt="trigger folding of the section" width="13" height="6"/>
                         </div>
                       </div>
                       <div class="foldable-content">
@@ -371,7 +371,7 @@ <h3>
                           <span class="pkg-report-header-score-granted">20</span>
                           /
                           <span class="pkg-report-header-score-max">20</span>
-                          <img class="foldable-icon" src="/static/hash-%%etag%%/img/report-foldable-icon.svg" alt="icon to trigger folding of the section" width="13" height="6"/>
+                          <img class="foldable-icon" src="/static/hash-%%etag%%/img/report-foldable-icon.svg" alt="trigger folding of the section" width="13" height="6"/>
                         </div>
                       </div>
                       <div class="foldable-content">
@@ -413,7 +413,7 @@ <h3>
                           <span class="pkg-report-header-score-granted">20</span>
                           /
                           <span class="pkg-report-header-score-max">20</span>
-                          <img class="foldable-icon" src="/static/hash-%%etag%%/img/report-foldable-icon.svg" alt="icon to trigger folding of the section" width="13" height="6"/>
+                          <img class="foldable-icon" src="/static/hash-%%etag%%/img/report-foldable-icon.svg" alt="trigger folding of the section" width="13" height="6"/>
                         </div>
                       </div>
                       <div class="foldable-content">
@@ -457,7 +457,7 @@ <h3>
                           <span class="pkg-report-header-score-granted">50</span>
                           /
                           <span class="pkg-report-header-score-max">50</span>
-                          <img class="foldable-icon" src="/static/hash-%%etag%%/img/report-foldable-icon.svg" alt="icon to trigger folding of the section" width="13" height="6"/>
+                          <img class="foldable-icon" src="/static/hash-%%etag%%/img/report-foldable-icon.svg" alt="trigger folding of the section" width="13" height="6"/>
                         </div>
                       </div>
                       <div class="foldable-content">
@@ -481,7 +481,7 @@ <h3>
                           <span class="pkg-report-header-score-granted">20</span>
                           /
                           <span class="pkg-report-header-score-max">20</span>
-                          <img class="foldable-icon" src="/static/hash-%%etag%%/img/report-foldable-icon.svg" alt="icon to trigger folding of the section" width="13" height="6"/>
+                          <img class="foldable-icon" src="/static/hash-%%etag%%/img/report-foldable-icon.svg" alt="trigger folding of the section" width="13" height="6"/>
                         </div>
                       </div>
                       <div class="foldable-content">
diff --git a/app/test/task/testdata/goldens/packages/oxygen/versions/2.0.0.html b/app/test/task/testdata/goldens/packages/oxygen/versions/2.0.0.html
index 4dc5277b78..baa1787363 100644
--- a/app/test/task/testdata/goldens/packages/oxygen/versions/2.0.0.html
+++ b/app/test/task/testdata/goldens/packages/oxygen/versions/2.0.0.html
@@ -76,7 +76,7 @@ <h3>Dart</h3>
         <div class="nav-container nav-help-container-mobile foldable">
           <h3 class="foldable-button">
             Pub.dev
-            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="icon to toggle folding of the section" width="13" height="6"/>
+            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="toggle folding of the section" width="13" height="6"/>
           </h3>
           <div class="foldable-content">
             <a class="nav-link" href="/help/search" rel="noopener" target="_blank">Searching for packages</a>
@@ -86,7 +86,7 @@ <h3 class="foldable-button">
         <div class="nav-container nav-help-container-mobile foldable">
           <h3 class="foldable-button">
             Flutter
-            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="icon to toggle folding of the section" width="13" height="6"/>
+            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="toggle folding of the section" width="13" height="6"/>
           </h3>
           <div class="foldable-content">
             <a class="nav-link" href="https://flutter.dev/using-packages/" rel="noopener" target="_blank">Using packages</a>
@@ -97,7 +97,7 @@ <h3 class="foldable-button">
         <div class="nav-container nav-help-container-mobile foldable">
           <h3 class="foldable-button">
             Dart
-            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="icon to toggle folding of the section" width="13" height="6"/>
+            <img class="foldable-icon" src="/static/hash-%%etag%%/img/nav-mobile-foldable-icon.svg" alt="toggle folding of the section" width="13" height="6"/>
           </h3>
           <div class="foldable-content">
             <a class="nav-link" href="https://dart.dev/guides/packages" rel="noopener" target="_blank">Using packages</a>
diff --git a/pkg/_pub_shared/lib/validation/html/html_validation.dart b/pkg/_pub_shared/lib/validation/html/html_validation.dart
index 2b18edeb9c..beb428acd5 100644
--- a/pkg/_pub_shared/lib/validation/html/html_validation.dart
+++ b/pkg/_pub_shared/lib/validation/html/html_validation.dart
@@ -29,28 +29,18 @@ void parseAndValidateHtml(String html) {
 /// - `<script> tags have no `src` attribute or have content (except `ld+json`
 ///   meta content).
 void validateHtml(Node root) {
-  List<Element> elements;
-  List<Element> links;
-  List<Element> scripts;
-  List<Element> buttons;
-
+  late List<Element> Function(String selector) querySelectorAll;
   if (root is DocumentFragment) {
-    elements = root.querySelectorAll('*');
-    links = root.querySelectorAll('a');
-    scripts = root.querySelectorAll('script');
-    buttons = root.querySelectorAll('button');
+    querySelectorAll = root.querySelectorAll;
   } else if (root is Document) {
     _validateCanonicalLink(root.querySelector('head')!);
-    elements = root.querySelectorAll('*');
-    links = root.querySelectorAll('a');
-    scripts = root.querySelectorAll('script');
-    buttons = root.querySelectorAll('button');
+    querySelectorAll = root.querySelectorAll;
   } else {
     throw AssertionError('Unknown html element type: $root');
   }
 
-  // No inline JS attribute
-  for (Element elem in elements) {
+  for (final elem in querySelectorAll('*')) {
+    // No inline JS attribute
     for (final attr in elem.attributes.keys) {
       final name = attr.toString();
       if (name.toLowerCase().startsWith('on')) {
@@ -58,9 +48,18 @@ void validateHtml(Node root) {
             'No inline JS attribute is allowed, found: ${elem.outerHtml}.');
       }
     }
+    // alt attribute should not contain the element type
+    final alt = elem.attributes['alt']?.toLowerCase();
+    if (alt != null) {
+      if (alt.split(' ').contains('icon')) {
+        throw AssertionError(
+            '"alt" attribute should not contain the type of the element: ${elem.outerHtml}');
+      }
+    }
   }
 
   // All <a target="_blank"> links must have rel="noopener"
+  final links = querySelectorAll('a');
   for (Element elem in links) {
     if (elem.attributes['target'] == '_blank') {
       if (!elem.attributes.containsKey('rel')) {
@@ -97,6 +96,7 @@ void validateHtml(Node root) {
   }
 
   // No inline script tag.
+  final scripts = querySelectorAll('script');
   for (Element elem in scripts) {
     if (elem.attributes['type'] == 'application/ld+json') {
       if (elem.attributes.length != 1) {
@@ -130,6 +130,7 @@ void validateHtml(Node root) {
   }
 
   // Lighthouse flags buttons that don't have text content or an `aria-label` property.
+  final buttons = querySelectorAll('button');
   for (final elem in buttons) {
     final text = elem.attributes['aria-label']?.trim() ?? elem.text.trim();
     if (text.isEmpty) {