Format all tests.

tests/isolate/object_leak_test.dart

 // Copyright (c) 2011, 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.
 
 // Regression test for http://dartbug.com/18942
 
 library LeakTest;
+
 import "package:expect/expect.dart";
 import "package:async_helper/async_helper.dart";
 import 'dart:isolate';
 import 'dart:async';
 
-
 class A {
   var x = 0;
 }
 
 fun(msg) {
   var a = msg[0];
   var replyTo = msg[1];
   print("received: ${a.x}");
   a.x = 1;
   print("done updating: ${a.x}");
   replyTo.send("done");
 }
 
 main() {
   asyncStart();
   var a = new A();
   ReceivePort rp = new ReceivePort();
   Isolate.spawn(fun, [a, rp.sendPort]);
   rp.first.then((msg) {
     Expect.equals("done", msg);
     // Changes in other isolate must not reach here.
     Expect.equals(0, a.x);
     asyncEnd();
   });
 }