/usr/share/man/man3/lqr_carver_scan_line_ext.3.gz is in liblqr-1-0-dev 0.4.1-1.1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/man/man3/lqr_carver_scan_line.3.gz
/usr/share/man/man3/lqr_carver_scan_line.3.gz