/usr/share/doc/libreoffice-help-gl/changelog.Debian.gz is in libreoffice-help-gl 1:3.5.7-0ubuntu13.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/libreoffice-help-gl/../libreoffice-l10n-gl/changelog.Debian.gz