Format all tests.

tests/language/deferred_mixin_test.dart

 // Copyright (c) 2014, 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.
 
 import 'package:expect/expect.dart';
 import 'package:async_helper/async_helper.dart';
 
 import "deferred_mixin_lib1.dart" deferred as lib1;
 import "deferred_mixin_lib2.dart" deferred as lib2;
 
 class NonDeferredMixin {
- foo() => "NonDeferredMixin";
+  foo() => "NonDeferredMixin";
 }
 
 class NonDeferredMixin1 {
- foo() => "NonDeferredMixin1";
+  foo() => "NonDeferredMixin1";
 }
 
 class NonDeferredMixin2 {
- foo() => "NonDeferredMixin2";
+  foo() => "NonDeferredMixin2";
 }
 
 main() {
   Expect.equals("NonDeferredMixin", new NonDeferredMixin().foo());
   Expect.equals("NonDeferredMixin1", new NonDeferredMixin1().foo());
   Expect.equals("NonDeferredMixin2", new NonDeferredMixin2().foo());
   asyncStart();
   lib1.loadLibrary().then((_) {
     Expect.equals("lib1.Mixin", new lib1.Mixin().foo());
     Expect.equals("A with NonDeferredMixin", new lib1.A().foo());
     Expect.equals("B with lib1.Mixin", new lib1.B().foo());
     Expect.equals("C with NonDeferredMixin1", new lib1.C().foo());
     Expect.equals("D with lib1.Mixin", new lib1.D().foo());
     Expect.equals("E with SharedMixin", new lib1.E().foo());
     lib2.loadLibrary().then((_) {
       Expect.equals("lib2.A with SharedMixin", new lib2.A().foo());
       asyncEnd();
     });
   });
 }