/usr/share/doc/gnat-gps/programmers_guide/_static/jquery.js is in gnat-gps-doc 5.3dfsg-1ubuntu1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/gnat-gps/programmers_guide/_static/../../../../javascript/sphinxdoc/1.0/jquery.js