Cosmetic changes to deferred_in_isolate2_test.

tests/isolate/deferred_in_isolate2_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 deferred_in_isolate2_test;
+
 import 'dart:isolate';
 import 'dart:async';
 import 'package:unittest/unittest.dart';
 
 import 'deferred_in_isolate2_lib.dart' deferred as lib;
 
 loadDeferred(port) {
   lib.loadLibrary().then((_) {
     port.send(lib.f());
   });
 }
 
 main() {
   test("Deferred loading in isolate", () {
     ReceivePort port = new ReceivePort();
     port.first.then(expectAsync((msg) {
        expect(msg, equals("hi"));
     }));
     Isolate.spawn(loadDeferred, port.sendPort);
   });
 }