pkg/unittest: much cleaner support for arbitrary args in expectAsync functions

pkg/unittest/test/unittest_test_utils.dart

Index: pkg/unittest/test/unittest_test_utils.dart
diff --git a/pkg/unittest/test/unittest_test_utils.dart b/pkg/unittest/test/unittest_test_utils.dart
index adb9823f366111179ed0b6bc437ebc8ba7b23de9..dfeb4075e2baaf67dc2919a6f64fdc89c89716f5 100644
--- a/pkg/unittest/test/unittest_test_utils.dart
+++ b/pkg/unittest/test/unittest_test_utils.dart
@@ -16,7 +16,7 @@ String buildStatusString(int passed, int failed, int errors,
                          String message: ''}) {
   var totalTests = 0;
   var testDetails = new StringBuffer();
-  if(results == null) {
+  if (results == null) {
     // no op
     assert(message == '');
   } else if (results is String) {
@@ -44,7 +44,7 @@ class TestConfiguration extends Configuration {
   final SendPort _port;
   String _result;
 
-  TestConfiguration(this._port) : super.blank();
+  TestConfiguration(this._port): super.blank();
 
   void onSummary(int passed, int failed, int errors, List<TestCase> results,
       String uncaughtError) {