/usr/share/man/man3/dehumanize_number.3bsd.gz is in libbsd-dev 0.8.7-1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/man/man3/humanize_number.3bsd.gz
/usr/share/man/man3/humanize_number.3bsd.gz