/usr/share/doc/gamera-gui/changelog.Debian.gz is in gamera-gui 3.3.2-2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/gamera-gui/../python-gamera/changelog.Debian.gz
/usr/share/doc/gamera-gui/../python-gamera/changelog.Debian.gz