hgext3rd/__init__.py

tests: add a few tests involving --collapse and rebase.singletransaction=1

I'm about to change the rebase code quite a bit and this was poorly
tested.

Differential Revision: https://phab.mercurial-scm.org/D2757

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