/usr/share/doc/devhelp/changelog.Debian.gz is in devhelp 3.4.1-0ubuntu1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/devhelp/../libdevhelp-3-0/changelog.Debian.gz
/usr/share/doc/devhelp/../libdevhelp-3-0/changelog.Debian.gz