/usr/lib/libtidy-0.99.so.0 is in libtidy-0.99-0 20091223cvs-1.4+deb8u1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/libtidy-0.99.so.0.0.0
/usr/lib/libtidy-0.99.so.0.0.0