/usr/share/doc/libt1-5-dbg/README.Debian is in libt1-5-dbg 5.1.2-3.4ubuntu1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/libt1-5-dbg/../libt1-5/README.Debian
/usr/share/doc/libt1-5-dbg/../libt1-5/README.Debian