/usr/share/doc/dia-gnome/changelog.Debian.gz is in dia-gnome 0.97.3-1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/dia-gnome/../dia-libs/changelog.Debian.gz
/usr/share/doc/dia-gnome/../dia-libs/changelog.Debian.gz