/usr/share/doc/ubuntu-packaging-guide-html-fr/singlehtml/_static/comment.png is in ubuntu-packaging-guide-html-fr 0.3.6.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/ubuntu-packaging-guide-html-fr/singlehtml/_static/../../../../ubuntu-packaging-guide/_static/comment.png