/usr/share/doc/libmagickcore-dev/NEWS.Debian.gz is in libmagickcore-dev 8:6.8.9.9-7ubuntu5.13.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/libmagickcore-dev/../libmagickcore-6.q16-2/NEWS.Debian.gz