Format all tests.

tests/html/async_cancellingisolate.dart

 library async_cancellingisolate;
 
 import 'dart:async';
 import 'package:unittest/unittest.dart';
 
 main(message, replyTo) {
   var command = message.first;
   expect(command, 'START');
   var shot = false;
   var oneshot;
@@ skipping 10 matching lines @@
       replyTo.send('DONE');
     });
   });
   // We launch the oneshot timer after the periodic timer. Otherwise a
   // (very long) context switch could make this test flaky: assume the
   // oneshot timer is created first and then there is a 30ms context switch.
   // when the periodic timer is scheduled it would execute after the oneshot.
   oneshot = new Timer(const Duration(milliseconds: 30), () {
     fail('Should never be invoked');
   });
-}
+}