/usr/share/man/man8/exim_tidydb.8.gz is in exim4-base 4.82-3ubuntu2.4.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/man/man8/exim_db.8.gz
/usr/share/man/man8/exim_db.8.gz