[issue28585] Restore docstring of os._isdir

[Serhiy Storchaka]

Serhiy Storchaka added the comment:

This is Windows specific issue. I'm unable to test the patch myself. Could anybody with access to Windows computer please test it?

----------

_______________________________________
Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue28585>
_______________________________________