/usr/share/doc/libfltk-images1.3/CREDITS is in libfltk-images1.3 1.3.2-4.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/libfltk-images1.3/../libfltk1.3/CREDITS
/usr/share/doc/libfltk-images1.3/../libfltk1.3/CREDITS