/usr/share/doc/puredata-doc/1.manual is in puredata-doc 0.43.0-4.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/puredata-doc/../../puredata/doc/1.manual
/usr/share/doc/puredata-doc/../../puredata/doc/1.manual