/usr/share/doc/libgnomecanvas2-dev/README is in libgnomecanvas2-dev 2.30.3-2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/libgnomecanvas2-dev/../libgnomecanvas2-0/README
/usr/share/doc/libgnomecanvas2-dev/../libgnomecanvas2-0/README