Updated openstack/openstack
Project: openstack-dev/pbr  406667beee8fcb69161744d7c52532487c18c753
null
Fix up some docstrings.

The version.py docstrings were a) not PEP compliant and b) somewhat
out of sync with the code.

Change-Id: I87c4134ef80fd9e6fd57b66c58c3c5920ee0b6b6