/usr/share/doc/libs3d-dev/RelNotes-0.1.txt.gz is in libs3d-dev 0.2.2-14build1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/libs3d-dev/../libs3d2/RelNotes-0.1.txt.gz
/usr/share/doc/libs3d-dev/../libs3d2/RelNotes-0.1.txt.gz