/usr/share/doc/python-werkzeug/rst is in python-werkzeug-doc 0.9.4+dfsg-1.1ubuntu1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/python-werkzeug/../python-werkzeug-doc/html/_sources
/usr/share/doc/python-werkzeug/../python-werkzeug-doc/html/_sources