Tweak dart2js crash message

dart/lib/compiler/implementation/warnings.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.
 
 class MessageKind {
   final String template;
   const MessageKind(this.template);
 
   static const GENERIC = const MessageKind('#{1}');
 
@@ skipping 265 matching lines @@
 
 The Dart team would greatly appreciate if you would take a moment to
 report this problem at http://dartbug.com/new.
 
 Please include the following information:
 
 * the name and version of your operating system,
 
 * the Dart SDK build number (#{1}), and
 
-* the stack trace you see here.
+* the entire message you see here (including the full stack trace
+  below as well as the source location above).
 ''');
 
   toString() => template;
 
   Message message([List arguments = const []]) {
     return new Message(this, arguments);
   }
 
   CompilationError error([List arguments = const []]) {
     return new CompilationError(this, arguments);
@@ skipping 57 matching lines @@
 
 class CompileTimeConstantError extends Diagnostic {
   CompileTimeConstantError(MessageKind kind, List arguments)
     : super(kind, arguments);
 }
 
 class CompilationError extends Diagnostic {
   CompilationError(MessageKind kind, List arguments)
     : super(kind, arguments);
 }