doc: Strip trailing whitespace; other revisions

Make some random and non-comprehensive changes to the
template functions documentation to make them more
consistent.

docs/layouts/shortcodes/fileindex.html

@@ -11,6 +11,6 @@
                 <td>
                     <a href="{{$url}}{{.Name | urlize }}"> {{.Name}}</a>
                     </td>
-            </tr> 
+            </tr>
 	 {{ end }}
 </table>