/usr/share/doc/python-django-classy-tags-doc/html/_static/underscore.js is in python-django-classy-tags-doc 0.5.1-4.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/python-django-classy-tags-doc/html/_static/../../../../javascript/sphinxdoc/1.0/underscore.js