Fixing dart:html links _not_ found in docs.json

tools/dom/src/dart2js_WrappedEvent.dart

 // Copyright (c) 2013, 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 dart.html;
 
 /**
  * Helper class to implement custom events which wrap DOM events.
  */
 class _WrappedEvent implements Event {
@@ skipping 58 matching lines @@
       target = target.parent;
     } while (target != null && target != currentTarget.parent);
     throw new StateError('No selector matched for populating matchedTarget.');
   }
 
   /**
    * This event's path, taking into account shadow DOM.
    *
    * ## Other resources
    *
-   * * [Shadow DOM extensions to Event]
-   * (http://w3c.github.io/webcomponents/spec/shadow/#extensions-to-event) from
-   * W3C.
+   * * [Shadow DOM extensions to
+   *   Event](http://w3c.github.io/webcomponents/spec/shadow/#extensions-to-event)
+   *   from W3C.
    */
   // https://dvcs.w3.org/hg/webcomponents/raw-file/tip/spec/shadow/index.html#extensions-to-event
   @Experimental()
   List<Node> get path => wrapped.path;
 
   dynamic get _get_currentTarget => wrapped._get_currentTarget;
 
   dynamic get _get_target => wrapped._get_target;
 }