update 2to3 script from 2to3 trunk
diff --git a/Tools/scripts/2to3 b/Tools/scripts/2to3
index 4fd2cf8..2a447cf 100755
--- a/Tools/scripts/2to3
+++ b/Tools/scripts/2to3
@@ -1,7 +1,6 @@
 #!/usr/bin/env python
-from lib2to3 import refactor
+from lib2to3.main import main
 import sys
 import os
 
-fixers = os.path.join(os.path.dirname(refactor.__file__), "fixes")
-sys.exit(refactor.main(fixers))
+sys.exit(main("lib2to3.fixes"))