Format all tests.

tests/language_strong/constructor3_negative_test.dart

 // Copyright (c) 2011, 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.
 
 // Check that there's no crash when constructor called with wrong
 // number of args.
 
-
 class Klass {
   Klass(var v) {}
 }
 
-
 main() {
   var k = new Klass();
   var l = new Klass(1, 2);
 }