/usr/share/doc/gearhead-sdl/man_umek.txt is in gearhead-sdl 1.302-4.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/gearhead-sdl/../../games/gearhead/doc/man_umek.txt
/usr/share/doc/gearhead-sdl/../../games/gearhead/doc/man_umek.txt