dart2js: run dartfmt on tests

tests/compiler/dart2js_extra/deferred_inheritance_test.dart

 // Copyright (c) 2016, 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 --fast-startup. The compiler used to emit inherit calls
 /// on each fragment even for classes that were already loaded on a different
 /// fragment. As a result, the inheritance chain was overwritten in non-chrome
 /// browsers (by using __proto__, we evaded this issue in Chrome).
 library deferred_inheritance_test;
 
 import 'deferred_inheritance_lib2.dart';
 import 'deferred_inheritance_lib1.dart' deferred as d;
 
 import 'package:expect/expect.dart';
 
 class B extends A {}
 
 /// If the check `y is A` is generated as `y.$isA` then the issue is not
 /// exposed. We use `AssumeDynamic` to ensure that we generate as `y instanceof
 /// A` in JS.
-@NoInline() @AssumeDynamic()
+@NoInline()
+@AssumeDynamic()
 check(y) => Expect.isTrue(y is A);
 
 main() {
   check(new B());
   d.loadLibrary().then((_) {
-      check(new d.C());
-      check(new B()); // This fails if we overwrite the inheritance chain.
+    check(new d.C());
+    check(new B()); // This fails if we overwrite the inheritance chain.
   });
 }