/usr/share/doc/foobillardplus/manual is in foobillardplus-data 3.43~svn170+dfsg-4.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/foobillardplus/../../games/foobillardplus/data/locale
/usr/share/doc/foobillardplus/../../games/foobillardplus/data/locale