Link to stable-errors site from pub-build messages on the command line.

pkg/observe/lib/transformer.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.
 
 /// Code transform for @observable. The core transformation is relatively
 /// straightforward, and essentially like an editor refactoring.
 library observe.transformer;
 
 import 'dart:async';
 
@@ skipping 55 matching lines @@
       // plausibly might need to be transformed. If not, we can avoid an
       // expensive parse.
       if (!observableMatcher.hasMatch(content)) return null;
 
       var id = transform.primaryInput.id;
       // TODO(sigmund): improve how we compute this url
       var url = id.path.startsWith('lib/')
             ? 'package:${id.package}/${id.path.substring(4)}' : id.path;
       var sourceFile = new SourceFile(content, url: url);
       var logger = new BuildLogger(transform,
-          convertErrorsToWarnings: !releaseMode);
+          convertErrorsToWarnings: !releaseMode,
+          detailsUri: 'http://goo.gl/5HPeuP');
       var transaction = _transformCompilationUnit(
           content, sourceFile, logger);
       if (!transaction.hasEdits) {
         transform.addOutput(transform.primaryInput);
       } else {
         var printer = transaction.commit();
         // TODO(sigmund): emit source maps when barback supports it (see
         // dartbug.com/12340)
         printer.build(url);
         transform.addOutput(new Asset.fromString(id, printer.text));
@@ skipping 316 matching lines @@
     token = token.next;
   }
   return token;
 }
 
 // TODO(sigmund): remove hard coded Polymer support (@published). The proper way
 // to do this would be to switch to use the analyzer to resolve whether
 // annotations are subtypes of ObservableProperty.
 final observableMatcher =
     new RegExp("@(published|observable|PublishedProperty|ObservableProperty)");