Add optional message argument to assert statements in the VM.

sdk/lib/core/set.dart

 // Copyright (c) 2011, 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.core;
 
 /**
  * A collection of objects in which each object can occur only once.
  *
  * That is, for each object of the element type, the object is either considered
@@ skipping 130 matching lines @@
   /**
    * Removes all elements of this set that are not elements in [elements].
    *
    * Checks for each element of [elements] whether there is an element in this
    * set that is equal to it (according to `this.contains`), and if so, the
    * equal element in this set is retained, and elements that are not equal
    * to any element in `elements` are removed.
    */
   void retainAll(Iterable<Object> elements);
 
-  /**
-   * Removes all elements of this set that satisfy [test].
+  /*
+*   * Removes all elements of this set that satisfy [test].
    */
   void removeWhere(bool test(E element));
 
   /**
    * Removes all elements of this set that fail to satisfy [test].
    */
   void retainWhere(bool test(E element));
 
   /**
    * Returns whether this Set contains all the elements of [other].
@@ skipping 32 matching lines @@
   /* Creates a [Set] with the same elements and behavior as this `Set`.
    *
    * The returned set behaves the same as this set
    * with regard to adding and removing elements.
    * It initially contains the same elements.
    * If this set specifies an ordering of the elements,
    * the returned set will have the same order.
    */
   Set<E> toSet();
 }