pkg/unittest: test cleanup

pkg/unittest/test/skipped_soloed_nested_test.dart

 // Copyright (c) 2013, 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 unittestTest;
+
+import 'dart:async';
 import 'dart:isolate';
-import 'dart:async';
+
 import 'package:unittest/unittest.dart';
 
-part 'unittest_test_utils.dart';
+part 'utils.dart';
 
 var testName = 'skipped/soloed nested groups with setup/teardown';
 
 var testFunction = (_) {
   StringBuffer s = null;
   setUp(() {
     if (s == null) s = new StringBuffer();
   });
   test('top level', () {
     s.write('A');
@@ skipping 46 matching lines @@
 
 var expected =  buildStatusString(6, 0, 0,
     'non-solo group solo_test in non-solo group::'
     'solo group solo group non-solo test::'
     'solo group solo group solo test::'
     'solo group nested non-solo group in solo group nested non-'
     'solo group non-solo test::'
     'solo group nested non-solo group in solo'
     ' group nested non-solo group solo test::'
     'final');