Migrated test block 26 to Dart 2.0.

tests/corelib_2/sort_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.
 
 // Dart test for sort routines.
 library sort_test;
 
 import "package:expect/expect.dart";
 import 'sort_helper.dart';
 
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     8,
     8,
     8,
     9,
     9,
     9,
     9,
     9
   ]);
 }