/usr/share/doc/granite-demo/changelog.Debian.gz is in granite-demo 0.1.0-0ubuntu2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/granite-demo/../libgranite0/changelog.Debian.gz
/usr/share/doc/granite-demo/../libgranite0/changelog.Debian.gz