Francesco, Thank you for caring about this issue.
I'd welcome your help in the upstream bug at https://bugs.ruby-lang.org/issues/11844 A text patch explaining the current state for the d/copyright file in ruby2.3 would also be very welcome. Best, -- ,''`. Christian Hofstaedtler <z...@debian.org> : :' : Debian Developer `. `' 7D1A CFFA D9E0 806C 9C4C D392 5C13 D6DB 9305 2E03 `-