git pull manpage: don't include -n from fetch-options.txt
The -n option stands for --no-summary in git pull
[jes: reworded the description to avoid mentioning 'git-fetch';
also exclude '-n' conditional on git-pull -- ugly because of
the missing "else" statement in asciidoc]
Signed-off-by: Miklos Vajna <vmiklos@frugalware.org> Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>