/usr/share/doc/libexpat1-dev/changelog.Debian.gz is in libexpat1-dev 2.2.5-3.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/libexpat1-dev/../libexpat1/changelog.Debian.gz
/usr/share/doc/libexpat1-dev/../libexpat1/changelog.Debian.gz