pkg/docgen: test fixes

pkg/docgen/test/single_library_test.dart

+// Copyright (c) 2014, 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.
+
 library single_library_test;
 
 import 'dart:io';
 
 import 'package:path/path.dart' as path;
 import 'package:unittest/unittest.dart';
 
 import '../lib/docgen.dart';
 import '../../../sdk/lib/_internal/compiler/implementation/mirrors/mirrors_util.dart'
     as dart2js_util;
@@ skipping 108 matching lines @@
               'doThis').children.first.text;
           expect(methodDocComment, 'test.A.doThis');
 
           // Testing something with no reference
           var libraryDocComment = method.fixReference('foobar').text;
           expect(libraryDocComment, 'foobar');
         }).whenComplete(() => temporaryDir.deleteSync(recursive: true));
     });
   });
 }