Format all tests.

tests/html/htmlelement_test.dart

 library ElementTest;
+
 import 'package:unittest/unittest.dart';
 import 'package:unittest/html_config.dart';
 import 'dart:html';
 import 'utils.dart';
 
 main() {
   useHtmlConfiguration();
   test('InnerHTML', () {
     Element element = new Element.tag('div');
     element.id = 'test';
@@ skipping 41 matching lines @@
     }
 
     hasBeenInvoked = false;
     expect(div.dataset.putIfAbsent('bar', f), 'bar-value');
     expect(hasBeenInvoked, isTrue);
 
     hasBeenInvoked = false;
     expect(div.dataset.putIfAbsent('bar', f), 'bar-value');
     expect(hasBeenInvoked, isFalse);
 
-    final keys = <String> [];
-    final values = <String> [];
+    final keys = <String>[];
+    final values = <String>[];
     div.dataset.forEach((String key, String value) {
-        keys.add(key);
-        values.add(value);
+      keys.add(key);
+      values.add(value);
     });
     expect(keys, unorderedEquals(['foo', 'bar']));
     expect(values, unorderedEquals(['foo-value', 'bar-value']));
 
     expect(new List<String>.from(div.dataset.keys),
         unorderedEquals(['foo', 'bar']));
     expect(new List<String>.from(div.dataset.values),
         unorderedEquals(['foo-value', 'bar-value']));
 
     expect(div.dataset.length, 2);
@@ skipping 15 matching lines @@
         '<div id="dataDiv" data-my-message="Hello World"></div>',
         treeSanitizer: new NullTreeSanitizer());
     expect(otherDiv.dataset.containsKey('myMessage'), isTrue);
 
     Element anotherDiv = new Element.html(
         '<div id="dataDiv" data-eggs="bacon"></div>',
         treeSanitizer: new NullTreeSanitizer());
     expect(anotherDiv.dataset.containsKey('eggs'), isTrue);
   });
 }