/usr/share/doc/libitl-dev/changelog.Debian.gz is in libitl-dev 0.7.0-3build1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/libitl-dev/../libitl0/changelog.Debian.gz
/usr/share/doc/libitl-dev/../libitl0/changelog.Debian.gz