Fix typo that causes css files not to be removed when tabs are not used

Author: djungelorm

CHANGES.txt

@@ -1,3 +1,6 @@
+v1.1.7
+ * Fix css files not being removed when tabs are not used on a page
+
 v1.1.6
  * Don't emit an additional error in the copy assets handler if the build process fails
 

sphinx_tabs/tabs.py

@@ -222,7 +222,7 @@ def update_context(app, pagename, templatename, context, doctree):
         if 'css_files' in context:
             context['css_files'] = context['css_files'][:]
             for path in paths:
-                if path.endswith('.cs'):
+                if path.endswith('.css'):
                     context['css_files'].remove(path)
         if 'script_files' in context:
             context['script_files'] = context['script_files'][:]