/usr/share/doc/libace-htbp-dev/changelog.Debian.gz is in libace-htbp-dev 6.3.3+dfsg-1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/libace-htbp-dev/../libace-6.3.3/changelog.Debian.gz
/usr/share/doc/libace-htbp-dev/../libace-6.3.3/changelog.Debian.gz