Document some more crap.

common/content/completion.js

@@ -26,6 +26,8 @@ the provisions above, a recipient may use your version of this file under
 the terms of any one of the MPL, the GPL or the LGPL.
 }}} ***** END LICENSE BLOCK *****/
 
+/** @scope modules */
+
 /** 
  * Creates a new completion context.
  *
@@ -647,6 +649,9 @@ CompletionContext.prototype = {
     }
 }; //}}}
 
+/**
+ * @instance completion
+ */
 function Completion() //{{{
 {
     ////////////////////////////////////////////////////////////////////////////////