A help string in a plugin command argument help string contained (a typo
and) some invalid sphinx-isms causing autoprogram-cliff building from
python-openstackclient to fail with:
.../python-openstackclient/doc/source/cli/plugin-commands/watcher.rst:30:Inline emphasis start-string without end-string.
and
<CreateAuditTemplate>:1:Unexpected indentation.
This commit fixes the (typo and) help string formatting.
Change-Id: Ifb668b9ada94b679672f3bab562410bf12f4ca64