/usr/share/doc/evince-gtk/TODO is in evince-gtk 3.18.2-1ubuntu4.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/evince-gtk/../libevdocument3-4/TODO
/usr/share/doc/evince-gtk/../libevdocument3-4/TODO