/usr/share/man/man1/unison-2.40-gtk.1.gz is in unison-gtk 2.40.65-1ubuntu1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/man/man1/unison-2.40.65-gtk.1.gz
/usr/share/man/man1/unison-2.40.65-gtk.1.gz