More fixes for failures on the Windows bot

pkg/analysis_server/test/services/correction/strings_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 test.services.correction.strings;
 
 import 'package:analysis_server/src/services/correction/strings.dart';
 import 'package:test_reflective_loader/test_reflective_loader.dart';
 import 'package:unittest/unittest.dart' hide isEmpty;
 
+import '../../utils.dart';
+
 main() {
-  groupSep = ' | ';
+  initializeTestEnvironment();
   defineReflectiveTests(StringsTest);
 }
 
 @reflectiveTest
 class StringsTest {
   void test_capitalize() {
     expect(capitalize(''), '');
     expect(capitalize('a'), 'A');
     expect(capitalize('abc'), 'Abc');
     expect(capitalize('abc def'), 'Abc def');
@@ skipping 146 matching lines @@
     expect(repeat('abc', 3), 'abcabcabc');
   }
 
   void test_substringAfterLast() {
     expect(substringAfterLast('', '/'), '');
     expect(substringAfterLast('abc', ''), '');
     expect(substringAfterLast('abc', 'd'), 'abc');
     expect(substringAfterLast('abcbde', 'b'), 'de');
   }
 }