andy5995 [1] filed a deletion request for ruby-md2man [2]: Orphaned package. Upstream hasn't updated in ~9 years (https://github.com/sunaku/md2man). I think this package was basically replaced by go-md2man which is in Arch/extra
[1] https://aur.archlinux.org/account/andy5995/ [2] https://aur.archlinux.org/pkgbase/ruby-md2man/
