When explaining the "--tags" option as an equivalent to giving an
explicit "refs/tags/*:refs/tags/*" refspec, the two asterisks were
misinterpreted by AsciiDoc as a request to typeset the string
segment between them in bold.
We could fix it in two ways. We can replace them with {asterisk}s
while keeping the string as body text, or we can mark it as a
literal string with backquotes around it.
Let's do the latter, as it is teaching the user an "exactly as
typed" alternative.
Noticed-by: Ramkumar Ramachandra <artagnon@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>