More fixes for failures on the Windows bot

pkg/analyzer/test/source/sdk_ext_test.dart

 // Copyright (c) 2015, 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 test.source.sdk_ext;
 
 import 'package:analyzer/file_system/memory_file_system.dart';
 import 'package:analyzer/source/sdk_ext.dart';
 import 'package:unittest/unittest.dart';
 
+import '../utils.dart';
+
 main() {
-  groupSep = ' | ';
+  initializeTestEnvironment();
   group('SdkExtUriResolverTest', () {
     setUp(() {
       buildResourceProvider();
     });
     tearDown(() {
       clearResourceProvider();
     });
     test('test_NullPackageMap', () {
       var resolver = new SdkExtUriResolver(null);
       expect(resolver.length, equals(0));
@@ skipping 51 matching lines @@
     });
   });
 }
 
 MemoryResourceProvider resourceProvider;
 
 buildResourceProvider() {
   resourceProvider = new MemoryResourceProvider();
   resourceProvider.newFolder('/empty');
   resourceProvider.newFolder('/tmp');
-  resourceProvider.newFile('/tmp/_sdkext', r'''
+  resourceProvider.newFile(
+      '/tmp/_sdkext',
+      r'''
   {
     "dart:fox": "slippy.dart",
     "dart:bear": "grizzly.dart",
     "dart:relative": "../relative.dart",
     "dart:deep": "deep/directory/file.dart",
     "fart:loudly": "nomatter.dart"
   }''');
 }
 
 clearResourceProvider() {
   resourceProvider = null;
 }