Fix bad html library.

tools/dom/templates/html/impl/impl_Node.darttemplate

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 part of $LIBRARYNAME;
 
 /**
  * Lazy implementation of the child nodes of an element that does not request
  * the actual child nodes of an element until strictly necessary greatly
  * improving performance for the typical cases where it is not required.
@@ skipping 333 matching lines @@
       }
     }
   }
 
   /**
    * Get a stream of models, whenever the model changes.
    */
   Stream<Node> get onModelChanged {
     var result;
     result = new StreamController(
-        onListen: () { _modelChangedStreams.add(result); }
+        onListen: () { _modelChangedStreams.add(result); },
         onCancel: () { _modelChangedStreams.remove(result); });
     return result;
   }
 
   /**
    * Print out a String representation of this Node.
    */
   String toString() => localName == null ?
       (nodeValue == null ? super.toString() : nodeValue) : localName;
 
 $!MEMBERS
 }