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