/usr/share/doc/python-abstract-rendering-doc/html/_static/sidebar.js is in python-abstract-rendering-doc 0.5.1-1ubuntu1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/python-abstract-rendering-doc/html/_static/../../../../javascript/sphinxdoc/1.0/sidebar.js