/usr/share/doc/libtaningia-dev/TODO is in libtaningia-dev 0.2.2-1ubuntu1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/libtaningia-dev/../libtaningia0/TODO
/usr/share/doc/libtaningia-dev/../libtaningia0/TODO