Format all tests.

tests/language/type_check_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.
 
 // Regression test for dart2js that used to remove the a B type check
 // after an A type check, because it thought any subtype of A had to be B.
 
 import "package:expect/expect.dart";
 
-class A {
-}
+class A {}
 
-class B extends A {
-}
+class B extends A {}
 
 main() {
   var a = [new A(), new B()];
   var b = a[0];
   b = b as A;
   Expect.throws(() => b as B, (e) => e is CastError);
 }