/usr/share/doc/python3-werkzeug/html is in python-werkzeug-doc 0.10.4+dfsg1-1ubuntu1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/python3-werkzeug/../python-werkzeug-doc/html
/usr/share/doc/python3-werkzeug/../python-werkzeug-doc/html