[cli-ref] disable html_use_smartypants
[cli-ref] disable html_use_smartypants

Many command helps have double dashes for command option.
To display correct, explicitly disable html_use_smartypants.

Change-Id: I5fdd598ac0a88c453ed484f847a70f671dac8039

openstack/openstack-manuals,openstack/openstack-manuals,openstack/openstack-manuals,openstack/openstack-manuals