Format all tests.

tests/language_strong/function_subtype_closure0_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 static functions.
 
 import 'package:expect/expect.dart';
 
 typedef I<T> f2<T>();
 
 class X {
   static J<bool> f1() => null;
 }
 
 class C<T> {
   C(f2<T> f);
 }
 
 class I<T> {}
+
 class J<T> extends I<int> {}
 
 main() {
-
   bool inCheckedMode = false;
   try {
     String a = 42;
   } catch (e) {
     inCheckedMode = true;
   }
 
   new C<int>(X.f1);
   if (inCheckedMode) {
     Expect.throws(() => new C<bool>(X.f1), (e) => true);
   }
-}
+}