Give the 404 page a title.
@@ -85,6 +85,7 @@ autosectionlabel_prefix_document = True
# sphinx-notfound-page
# https://github.com/rtfd/sphinx-notfound-page
notfound_context = {
+ 'title': 'Page Not Found',
'body': '''
<h1>Page not found</h1>
