/usr/share/doc/pd-pddp/README is in pd-pddp 0.1-2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/pd-pddp/../../../lib/pd/extra/pddp/README.txt
/usr/share/doc/pd-pddp/../../../lib/pd/extra/pddp/README.txt