Format all tests.

tests/language/regress_19728_test.dart

 // Copyright (c) 2014, 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.
 
 // Regression test for issue 19728.
 
 class C<T extends dynamic> {
   T field;
 
   test() {
     field = 0;
     int i = field;
   }
 }
 
 void main() {
   new C().test();
-}
+}