hgext3rd/__init__.py

tests: conditionalize an error message about unlinking a non empty directory

The message on Windows comes from win32.unlink().  It looks like os.unlink() on
posix platforms is a simple call to unlink(3), which turns into unlinkat(2).
Since there's a comment in one of the tests that the message should be improved,
I don't think it's worth adding a check in win32.unlink() to see if it's empty,
if that function is always going to fail on a directory.  (It seems like the
POSIX spec allows unlinking directories though.)

# name space package to host third party extensions
from __future__ import absolute_import
import pkgutil
__path__ = pkgutil.extend_path(__path__, __name__)