/usr/share/doc/python-nxt-filer/changelog.Debian.gz is in python-nxt-filer 2.2.2-2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/python-nxt-filer/../python-nxt/changelog.Debian.gz
/usr/share/doc/python-nxt-filer/../python-nxt/changelog.Debian.gz