Format all tests.

tests/language_strong/prefix24_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.
 
 library prefix24_test;
 
 import "package:expect/expect.dart";
 
 // Import a library that contains library prefix X.
 import "prefix24_lib1.dart";
 
 // Import a library that declares class X.
 import "prefix24_lib3.dart";
 
 // Check that the library prefix X that is used in library prefix24_lib1
 // remains private to that library and does not collide with class X
 // defined in (and imported from) prefix24_lib3;
 
 main() {
   Expect.equals("static method bar of class X", X.bar());
   Expect.equals("prefix24_lib2_bar", lib1_foo());
-}
+}