Fix test that failed on Russian Windows bit

tests/standalone/io/system_encoding_test.dart

 // Copyright (c) 2015, 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.
 
 import 'dart:io';
 import 'dart:convert';
 
 import "package:expect/expect.dart";
 
 // This only works reliabily for "ASCII" cross platform as that is the only
@@ skipping 18 matching lines @@
   testDecodeEncode(bytes);
   testEncodeDecode(str);
 }
 
 main() {
   test([65, 66, 67]);
   test([65, 0, 67]);
   test([0, 65, 0, 67, 0]);
   test([0, 0, 0]);
   test(new Iterable.generate(128, (i) => i).toList());
-  // This might break on some Windows systems.
-  testEncodeDecode('\u00c6\u00d8\u00c5');

[ricow1, 2015/06/25 07:03:38]

couldn't you just move it down to line 50 if this only breaks on windows

   if (Platform.isWindows) {
     // On Windows the default Windows code page cannot encode these
     // Unicode characters and the ? character is used.
     Expect.listEquals(
         SYSTEM_ENCODING.encode('\u1234\u5678\u9abc'),
         '???'.codeUnits);
   } else {
     // On all systems except for Windows UTF-8 is used as the system
     // encoding.
     Expect.listEquals(
         SYSTEM_ENCODING.encode('\u1234\u5678\u9abc'),
         UTF8.encode('\u1234\u5678\u9abc'));
   }
 }