From 6aaaf88189ef7246746537ee9766de3d56820c8d Mon Sep 17 00:00:00 2001
From: Jake VanderPlas <jakevdp@google.com>
Date: Wed, 13 Oct 2021 07:04:04 -0700
Subject: [PATCH] DOC: fix use of deprecated sphinx functions

---
 altair/sphinxext/altairgallery.py | 2 +-
 altair/sphinxext/schematable.py   | 6 +++---
 doc/conf.py                       | 4 ++--
 3 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/altair/sphinxext/altairgallery.py b/altair/sphinxext/altairgallery.py
index 1a064c0b3..28393306b 100644
--- a/altair/sphinxext/altairgallery.py
+++ b/altair/sphinxext/altairgallery.py
@@ -303,7 +303,7 @@ def main(app):
 
 def setup(app):
     app.connect("builder-inited", main)
-    app.add_stylesheet("altair-gallery.css")
+    app.add_css_file("altair-gallery.css")
     app.add_config_value("altair_gallery_dir", "gallery", "env")
     app.add_config_value("altair_gallery_ref", "example-gallery", "env")
     app.add_config_value("altair_gallery_title", "Example Gallery", "env")
diff --git a/altair/sphinxext/schematable.py b/altair/sphinxext/schematable.py
index f7f12acc2..880e7e190 100644
--- a/altair/sphinxext/schematable.py
+++ b/altair/sphinxext/schematable.py
@@ -37,7 +37,7 @@ def type_description(schema):
 
 
 def prepare_table_header(titles, widths):
-    """Build docutil empty table """
+    """Build docutil empty table"""
     ncols = len(titles)
     assert len(widths) == ncols
 
@@ -60,7 +60,7 @@ def prepare_table_header(titles, widths):
 
 
 def add_class_def(node, classDef):
-    """Add reference on classDef to node """
+    """Add reference on classDef to node"""
 
     ref = addnodes.pending_xref(
         reftarget=classDef,
@@ -79,7 +79,7 @@ def add_class_def(node, classDef):
 
 
 def add_text(node, text):
-    """Add text with inline code to node """
+    """Add text with inline code to node"""
     is_text = True
     for part in reCode.split(text):
         if part:
diff --git a/doc/conf.py b/doc/conf.py
index 3a39289f3..336d55d0d 100644
--- a/doc/conf.py
+++ b/doc/conf.py
@@ -163,8 +163,8 @@
 # and
 # https://github.com/rtfd/sphinx_rtd_theme/issues/117
 def setup(app):
-    app.add_stylesheet("theme_overrides.css")
-    app.add_stylesheet("custom.css")
+    app.add_css_file("theme_overrides.css")
+    app.add_css_file("custom.css")
 
 # Add any extra paths that contain custom files (such as robots.txt or
 # .htaccess) here, relative to this directory. These files are copied