Because there is no unescaped apostrophe to pair it with, asciidoc
does not consider this apostrophe a candidate for escaping and
the backslash passes through.
Reported-by: Frédéric Brière <fbriere@fbriere.net> Signed-off-by: Jonathan Nieder <jrnieder@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>