minor #3485 [Cookbook][Assetic] Fix "javascripts" tag name typo (bicpi)

This PR was merged into the 2.3 branch.

Discussion
----------

[Cookbook][Assetic] Fix "javascripts" tag name typo

| Q             | A
| ------------- | ---
| Doc fix?      | yes
| New docs?     | no
| Applies to    | all
| Fixed tickets | -

Maybe the following note *This will most commonly live in the ``javascripts`` block...* is a bit confusing because the example does not show this Twig block and it has the same name as the Twig tag... The note could either be removed or I could add the `javascripts` Twig block to clarify?

Commits
-------

f9a287b Move note about "javascripts" and "stylesheets" blocks to separate note blocks
cf8064d [Cookbook][Assetic] Fix "javascripts" tag name typo

cookbook/assetic/asset_management.rst

@@ -53,9 +53,7 @@ behind adding either is basically the same, but with a slightly different syntax
 Including JavaScript Files
 ~~~~~~~~~~~~~~~~~~~~~~~~~~
 
-To include JavaScript files, use the ``javascript`` tag in any template.
-This will most commonly live in the ``javascripts`` block, if you're using
-the default block names from the Symfony Standard Distribution:
+To include JavaScript files, use the ``javascripts`` tag in any template:
 
 .. configuration-block::
 
@@ -73,6 +71,22 @@ the default block names from the Symfony Standard Distribution:
             <script type="text/javascript" src="<?php echo $view->escape($url) ?>"></script>
         <?php endforeach; ?>
 
+.. note::
+
+    If you're using the default block names from the Symfony Standard Edition,
+    the ``javascripts`` tag will most commonly live in the ``javascripts``
+    block:
+
+    .. code-block:: html+jinja
+
+        {# ... #}
+        {% block javascripts %}
+            {% javascripts '@AcmeFooBundle/Resources/public/js/*' %}
+                <script type="text/javascript" src="{{ asset_url }}"></script>
+            {% endjavascripts %}
+        {% endblock %}
+        {# ... #}
+
 .. tip::
 
     You can also include CSS Stylesheets: see :ref:`cookbook-assetic-including-css`.
@@ -95,9 +109,7 @@ Including CSS Stylesheets
 ~~~~~~~~~~~~~~~~~~~~~~~~~
 
 To bring in CSS stylesheets, you can use the same methodologies seen
-above, except with the ``stylesheets`` tag. If you're using the default
-block names from the Symfony Standard Distribution, this will usually live
-inside a ``stylesheets`` block:
+above, except with the ``stylesheets`` tag:
 
 .. configuration-block::
 
@@ -116,6 +128,22 @@ inside a ``stylesheets`` block:
             <link rel="stylesheet" href="<?php echo $view->escape($url) ?>" />
         <?php endforeach; ?>
 
+.. note::
+
+    If you're using the default block names from the Symfony Standard Edition,
+    the ``stylesheets`` tag will most commonly live in the ``stylesheets``
+    block:
+
+    .. code-block:: html+jinja
+
+        {# ... #}
+        {% block stylesheets %}
+            {% stylesheets 'bundles/acme_foo/css/*' filter='cssrewrite' %}
+                <link rel="stylesheet" href="{{ asset_url }}" />
+            {% endstylesheets %}
+        {% endblock %}
+        {# ... #}
+
 But because Assetic changes the paths to your assets, this *will* break any
 background images (or other paths) that uses relative paths, unless you use
 the :ref:`cssrewrite <cookbook-assetic-cssrewrite>` filter.