/usr/share/doc/libatasmart-dev/changelog.Debian.gz is in libatasmart-dev 0.19-3.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/libatasmart-dev/../libatasmart4/changelog.Debian.gz
/usr/share/doc/libatasmart-dev/../libatasmart4/changelog.Debian.gz