Remove .html extension from links

chrome/common/extensions/docs/templates/articles/ui_override.html

 <h1>User Interface Overrides</h1>
 
 <p>
 User interface overrides are a way for extensions to override selected Chrome
 user interface properties.
 </p>
 
 <h2 id="bookmarks">Bookmarks User Interface</h2>
 <p>
 Register the user interface properties you want to override in the
-<a href="manifest.html">extension manifest</a> like this:
+<a href="manifest">extension manifest</a> like this:
 </p>
 
 <pre>{
   "name": "My extension",
   ...
 <b>
   "chrome_ui_overrides" : {
     "bookmarks_ui": {
       "remove_button": "true",
       "remove_bookmark_shortcut": "true"
@@ skipping 43 matching lines @@
     <tr><th>Type</th><th>Attribute</th><th>Description</th></tr>
     {{+partials.type_item
        title:f.strings.properties
        display_name:display_name
        items:f.properties
        item_partial:(partials.parameter_full hideParamTOC:true)/}}
     </table>
   {{/}}
 {{/}}
 </ul>