Fixing formatting of dart:html's dart2js annotations.

tools/dom/templates/html/impl/impl_WheelEvent.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 html;
-$ANNOTATIONS
-class $CLASSNAME$EXTENDS$IMPLEMENTS$NATIVESPEC {
+
+$(ANNOTATIONS)class $CLASSNAME$EXTENDS$IMPLEMENTS$NATIVESPEC {
 
   factory WheelEvent(String type, Window view, int wheelDeltaX, int wheelDeltaY,
       int detail, int screenX, int screenY, int clientX, int clientY,
       int button,
       [bool canBubble = true, bool cancelable = true, bool ctrlKey = false,
       bool altKey = false, bool shiftKey = false, bool metaKey = false,
       EventTarget relatedTarget = null]) {
 
     var eventType = 'WheelEvent';
     if (_Device.isFirefox) {
@@ skipping 174 matching lines @@
 $else
   @DomName('WheelEvent.deltaX')
   num get deltaX => $dom_wheelDeltaX;
   @DomName('WheelEvent.deltaY')
   num get deltaY => $dom_wheelDeltaY;
   @DomName('WheelEvent.deltaMode')
   int get deltaMode => 0;
 
 $endif
 }