/usr/share/doc/xserver-xorg-input-synaptics-dbg/NEWS.Debian.gz is in xserver-xorg-input-synaptics-dbg 1.7.4-0ubuntu1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/xserver-xorg-input-synaptics-dbg/../xserver-xorg-input-synaptics/NEWS.Debian.gz