cli: bogous 'help show event' output

'help show event' command shows unreadable
text in the parameter description

Change-Id: Ic8dfe2a5d4fd7830a184f87deb51aabd2fcd0d41
Bug-Url: https://bugzilla.redhat.com/980854
Signed-off-by: Ravi Nori <rnori@redhat.com>