Add a test for http://code.google.com/p/dart/issues/detail?id=223.

tests/language/src/FactoryArrowTest.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.
+
+class A {
+  A.foo() {}
+  factory A() => new A.foo();
+}
+
+main() {
+ Expect.isTrue(new A() is A);

[kasperl, 2011/10/25 08:27:56]

Indent one more.

[ngeoffray, 2011/10/25 08:33:00]

Done. I'd like to say I left it here on purpose... :) Nice catch

+}