Change
Parameter 'mode' expects halt|powerdown|reboot
to
Parameter 'mode' expects 'halt', 'powerdown', or 'reboot'
for consistency with similar error messages elsewhere.
Cc: Michael Roth <mdroth@linux.vnet.ibm.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20201113082626.2725812-9-armbru@redhat.com>