doc: move rev-list option -<n> from git-log.txt to rev-list-options.txt rev-list-options.txt is included in git-rev-list.txt. This makes sure rev-list man page also shows that, and at one place, together with equivalent options -n and --max-count. Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>