Updated openstack/openstack
Project: openstack/python-swiftclient  d721dc7b61dabe49a603b781d44a05bfd9c9bed4
null
Improve help strings

Make help strings more consistent:
* Fix wording and grammar, remove duplicated words
* Add "." consistently everywhere.

Change-Id: I37f94600df2a58532633f6bab2ab82fc5e91a75b