Format all tests.

tests/html/custom_element_name_clash_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 custom_elements_name_clash;
 
-
 import 'dart:async';
 import 'dart:html';
 import 'package:unittest/html_individual_config.dart';
 import 'package:unittest/unittest.dart';
 import 'utils.dart';
 
-
 class CustomElement extends HtmlElement {
   factory CustomElement() => new Element.tag('x-custom');
 
-  CustomElement.created() : super.created() {
-  }
+  CustomElement.created() : super.created() {}
 
   // Try to clash with native 'appendChild' method.
   var appendChild = 123;
 }
 
 main() {
   useHtmlIndividualConfiguration();
 
   setUp(() => customElementsReady);
 
   group('test', () {
     test('test', () {
       document.registerElement('x-custom', CustomElement);
       CustomElement custom = new CustomElement();
       document.body.children.add(custom);
       // Will call appendChild in JS.
-      custom.children.add(new DivElement()..text = 'Hello world!'); 
+      custom.children.add(new DivElement()..text = 'Hello world!');
     });
   });
 }