Format all tests.

tests/html/element_types_test.dart

 // Copyright (c) 2012, 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 element_types;
+
 import 'package:unittest/unittest.dart';
 import 'package:unittest/html_individual_config.dart';
 import 'dart:html';
 
 main() {
   useHtmlIndividualConfiguration();
 
   group('supported_content', () {
     test('supported', () {
       expect(ContentElement.supported, true);
@@ skipping 59 matching lines @@
       expect(TemplateElement.supported, true);
     });
   });
 
   group('supported_track', () {
     test('supported', () {
       expect(TrackElement.supported, true);
     });
   });
 }