[polymer] switch comment style

pkg/polymer/test/build/utils_test.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.
 
-/** Tests for some of the utility helper functions used by the compiler. */
+/// Tests for some of the utility helper functions used by the compiler.
 library polymer.test.utils_test;
 
 import 'package:unittest/compact_vm_config.dart';
 import 'package:unittest/unittest.dart';
 import 'package:polymer/src/build/utils.dart';
 
 main() {
   useCompactVMConfiguration();
 
   for (bool startUppercase in [false, true]) {
@@ skipping 61 matching lines @@
       expect(toHyphenedName('Hi'), 'hi');
       expect(toHyphenedName('Hi-'), 'hi-');
       expect(toHyphenedName('HiFriend'), 'hi-friend');
     });
 
     test('consecutive capital letters', () {
       expect(toHyphenedName('aBC'), 'a-b-c');
     });
   });
 }