Get rid of #source in pub.

utils/pub/version.dart

 // 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.
 
 /**
  * Handles version numbers, following the [Semantic Versioning][semver] spec.
  *
  * [semver]: http://semver.org/
  */
-#library('pub_version');
+#library('version');
 
 #import('utils.dart');
 
 /** A parsed semantic version number. */
 class Version implements Comparable, Hashable, VersionConstraint {
   static get none() => new Version(0, 0, 0);
 
   static final _PARSE_REGEX = const RegExp(
       @'^'                                        // Start at beginning.
       @'(\d+).(\d+).(\d+)'                        // Version number.
@@ skipping 179 matching lines @@
     }
   }
 
   /** Tests if [other] matches falls within this version range. */
   bool allows(Version other) {
     if (min != null && other < min) return false;
     if (max != null && other >= max) return false;
     return true;
   }
 }