dart2js: run dartfmt on tests

tests/compiler/dart2js_native/subclassing_super_field_1_test.dart

 // Copyright (c) 2013, 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 'dart:_foreign_helper' show JS;
 import 'dart:_js_helper' show Native, Creates, setNativeSubclassDispatchRecord;
-import 'dart:_interceptors' show
-    findInterceptorForType, findConstructorForNativeSubclassType;
+import 'dart:_interceptors'
+    show findInterceptorForType, findConstructorForNativeSubclassType;
 
 // Test for shadowed fields in classes that extend native classes.
 
 @Native("N")
 class N {
   N.init();
 }
 
 class A extends N {
   var foo = 111;
   A.init() : super.init();
 }
 
-class B extends A  {
+class B extends A {
   var foo = 222;
   B.init() : super.init();
 
   Afoo() => super.foo;
   Bfoo() => foo;
 }
 
-B makeB() native;
+B makeB() native ;
 
 @Creates('=Object')
-getBPrototype() native;
+getBPrototype() native ;
 
 void setup() native r"""
 function B() { }
 makeB = function(){return new B;};
 
 getBPrototype = function(){return B.prototype;};
 """;
 
 var inscrutable;
 
@@ skipping 10 matching lines @@
   JS('', '#(#)', constructor, b);
 
   print(b);
 
   Expect.equals(222, inscrutable(b).Bfoo());
   Expect.equals(111, inscrutable(b).Afoo());
 
   Expect.equals(222, b.Bfoo());
   Expect.equals(111, b.Afoo());
 }