Format all tests.

tests/language/function_subtype_typearg4_test.dart

 // Copyright (c) 2013, 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.
 // Dart test program for constructors and initializers.
 
 // Check function subtyping of type arguments.
 
 import 'package:expect/expect.dart';
 
 class C<T> {}
 
 class I {}
+
 class J extends I {}
 
 typedef I f1();
 typedef J f2();
 
 main() {
   Expect.isTrue(new C<f1>() is C<f2>);
-}
+}