/usr/share/doc/python-tornado-doc/html/_static/fonts/fontawesome-webfont.woff is in python-tornado-doc 4.4.3-1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/python-tornado-doc/html/_static/fonts/../../../../../sphinx_rtd_theme/static/fonts/fontawesome-webfont.woff