hgext3rd/__init__.py

help: avoid repeated value in the safe-mistmatch help

This was copy pasted and overlooked when it got in.

Differential Revision: https://phab.mercurial-scm.org/D12160

# name space package to host third party extensions
from __future__ import absolute_import
import pkgutil

__path__ = pkgutil.extend_path(__path__, __name__)