It slipped in during the conversion to reStructuredText.

In one case, part of the preformatted text shouldn't have been
marked as such, so that's addressed too. A spurious opening
parenthesis is dropped as well.

Signed-off-by: Andrea Bolognani <abologna@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>