/usr/share/doc/libinotify-ruby/changelog.Debian.gz is in libinotify-ruby 0.0.2-6.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/libinotify-ruby/../ruby-inotify/changelog.Debian.gz
/usr/share/doc/libinotify-ruby/../ruby-inotify/changelog.Debian.gz