Updating custom_html_writer after Sphinx update removed a class.

docs_build/custom_html_writer.py

@@ -1,3 +1,5 @@
+# Copyright 2017 Google Inc.
+#
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
 # You may obtain a copy of the License at
@@ -12,7 +14,7 @@
 
 """Custom HTML builder.
 
-This is used to verify that snippets do not get stale.
+This is used to verify that all snippets are ``doctest``-ed.
 
 See http://www.sphinx-doc.org/en/stable/extdev/tutorial.html to learn
 how to write a custom Sphinx extension.
@@ -33,7 +35,7 @@
 """
 
 
-class CustomHTMLWriter(html.SmartyPantsHTMLTranslator):
+class CustomHTMLWriter(html.HTMLTranslator):
     """Custom HTML writer.
 
     This makes sure that code blocks are all tested. It does this by
@@ -54,7 +56,7 @@ def visit_literal_block(self, node):
                     node.rawsource, language, test_type)
                 raise errors.ExtensionError(msg)
         # The base classes are not new-style, so we can't use super().
-        return html.SmartyPantsHTMLTranslator.visit_literal_block(self, node)
+        return html.HTMLTranslator.visit_literal_block(self, node)
 
 
 def setup(app):