/usr/share/man/man1/x86_64-linux-gnu-gnatxref-7.1.gz is in gnat-7 7.3.0-16ubuntu3.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/man/man1/x86_64-linux-gnu-gnat-7.1.gz
/usr/share/man/man1/x86_64-linux-gnu-gnat-7.1.gz