/usr/share/doc/python-magnumclient-doc/html/_static/searchtools.js is in python-magnumclient-doc 2.0.0-1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/python-magnumclient-doc/html/_static/../../../../javascript/sphinxdoc/1.0/searchtools.js