Format all tests.

tests/isolate/exit_at_spawn_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 exit_at_spawn;
 
 import "dart:isolate";
 import "dart:async";
 import "package:async_helper/async_helper.dart";
 import "package:expect/expect.dart";
 
 // Isolate exiting immediately.
 isomain(args) {}
 
 // Isolate exiting after running microtasks.
 isomain2(args) {
-  scheduleMicrotask((){});
+  scheduleMicrotask(() {});
 }
 
 // Isolate exiting after running timers.
 isomain3(args) {
-  new Timer(Duration.ZERO, (){});
+  new Timer(Duration.ZERO, () {});
 }
 
-main(){
+main() {
   asyncStart();
 
   test(isomain);
   test(isomain2);
   test(isomain3);
 
   asyncEnd();
 }
 
 void test(mainFunction) {
   asyncStart();
 
   RawReceivePort exitPort = new RawReceivePort();
   exitPort.handler = (message) {
     Expect.equals(null, message);
     exitPort.close();
     asyncEnd();
   };
 
-  Isolate.spawn(mainFunction,
-                null,
-                // Setup handler as part of spawn.
-                errorsAreFatal: false,
-                onExit: exitPort.sendPort);
+  Isolate.spawn(mainFunction, null,
+      // Setup handler as part of spawn.
+      errorsAreFatal: false,
+      onExit: exitPort.sendPort);
 }