/usr/share/doc/s3dfm/changelog.Debian.gz is in s3dfm 0.2.2-9.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/s3dfm/../libs3d2/changelog.Debian.gz
/usr/share/doc/s3dfm/../libs3d2/changelog.Debian.gz