dart2js: run dartfmt on tests

tests/compiler/dart2js_extra/23056_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.
 
 // Regression test for http://dartbug.com/23056/
 // Ensure that Mixin prototypes are initialized before first use.
 
 // Mirrors is the only way to have a getter be equipped with metadata.
 @MirrorsUsed(targets: 'M', override: '*')
 import 'dart:mirrors';
 
 import 'package:expect/expect.dart';
 
 class M {
   @NoInline()
   bool get foo => true;
 }
 
 class A extends Object with M {
   @NoInline()
   bool get foo => super.foo;
 }
 
-@AssumeDynamic() @NoInline()
+@AssumeDynamic()
+@NoInline()
 bool hide(bool x) => x;
 
 main() {
   Expect.isTrue((hide(true) ? new A() : new M()).foo);
 }