/usr/share/doc/libmpfr-dev/NEWS.gz is in libmpfr-dev 4.0.1-1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/libmpfr-dev/../libmpfr6/NEWS.gz
/usr/share/doc/libmpfr-dev/../libmpfr6/NEWS.gz