/usr/share/doc/python-vigra/rst is in python-vigra-doc 1.10.0+dfsg-11ubuntu2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/python-vigra/../python-vigra-doc/rst
/usr/share/doc/python-vigra/../python-vigra-doc/rst