Get rid of all the library tags.

test/message_change_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 shelf.message_change_test;
-
 import 'dart:async';
 import 'dart:convert';
 
 import 'package:test/test.dart';
 
 import 'package:shelf/shelf.dart';
 import 'package:shelf/src/message.dart';
 
 import 'test_util.dart';
 
@@ skipping 73 matching lines @@
     expect(copy.context, {'test': 'test value', 'test2': 'test2 value'});
   });
 
   test('existing context values are overwritten', () {
     var request = factory(context: {'test': 'test value'});
     var copy = request.change(context: {'test': 'new test value'});
 
     expect(copy.context, {'test': 'new test value'});
   });
 }