"Reverting 14829-14832"

utils/tests/pub/install/hosted/check_out_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.
 
 library pub_tests;
 
 import 'dart:io';
 
 import '../../test_pub.dart';
 import '../../../../../pkg/unittest/lib/unittest.dart';
 
 main() {
   test('checks out a package from a pub server', () {
     servePackages([package("foo", "1.2.3")]);
 
     appDir([dependency("foo", "1.2.3")]).scheduleCreate();
 
     schedulePub(args: ['install'],
-        output: new RegExp("Dependencies installed!\$"));
+        output: const RegExp("Dependencies installed!\$"));
 
     cacheDir({"foo": "1.2.3"}).scheduleValidate();
     packagesDir({"foo": "1.2.3"}).scheduleValidate();
 
     run();
   });
 }