"only happens" is a lot more often that you think. In my experience, "only" is quite frequent. A randomly picked case in point: Debian has had a local manual

"only happens" is a lot more often that you think. In my experience, "only" is quite frequent. A randomly picked case in point: Debian has had a local manual page for the original software's undocumented (in the old Sourceforge version) iptunnel(8) command for 7 years: https://salsa.debian.org/debian/net-tools/-/blob/debian/sid/debian/iptunnel.8 https://salsa.debian.org/debian/net-tools/-/blob/debian/sid/... Independently, the original came up with its own, quite different, manual page 3 years later: https://github.com/ecki/net-tools/blob/master/man/en_US/iptunnel.8 https://github.com/ecki/net-tools/blob/master/man/en_US/iptu... Then Debian imported that! https://salsa.debian.org/debian/net-tools/-/blob/debian/sid/man/en_US/iptunnel.8 https://salsa.debian.org/debian/net-tools/-/blob/debian/sid/... This sort of thing isn't a rare occurrence.