Format all tests.

tests/html/audiobuffersourcenode_test.dart

 library AudioBufferSourceNodeTest;
+
 import 'package:unittest/unittest.dart';
 import 'package:unittest/html_individual_config.dart';
 import 'dart:web_audio';
 
 main() {
-
   useHtmlIndividualConfiguration();
 
   group('supported', () {
     test('supported', () {
       expect(AudioContext.supported, true);
     });
   });
 
   group('functional', () {
     test('createBuffer', () {
-      if(AudioContext.supported) {
+      if (AudioContext.supported) {
         var ctx = new AudioContext();
         AudioBufferSourceNode node = ctx.createBufferSource();
         expect(node is AudioBufferSourceNode, isTrue);
         node.start(ctx.currentTime, 0, 2);
         expect(node is AudioBufferSourceNode, isTrue);
       }
     });
   });
 }