Format all tests.

tests/lib_strong/mirrors/metadata_const_map_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 20776. Tests that the needed classes for the
 // constant map in the metadata are generated.
 
 library lib;
 
 @MirrorsUsed(targets: 'lib')
 import 'dart:mirrors';
 
 class C {
   final x;
   const C(this.x);
 }
 
-@C(const {'foo': 'bar' })
+@C(const {'foo': 'bar'})
 class A {}
 
-
 main() {
   print(reflectClass(A).metadata);
-}
+}