/usr/share/ is in cl-spatial-trees 0.2-6.
This file is owned by root:root, with mode 0o755.
..
/usr/share/common-lisp/
/usr/share/common-lisp/source/
/usr/share/common-lisp/source/spatial-trees/
/usr/share/common-lisp/source/spatial-trees/spatial-tree-test.lisp
/usr/share/common-lisp/source/spatial-trees/greene-trees.lisp
/usr/share/common-lisp/source/spatial-trees/spatial-trees.asd
/usr/share/common-lisp/source/spatial-trees/rectangles.lisp
/usr/share/common-lisp/source/spatial-trees/rstar-trees.lisp
/usr/share/common-lisp/source/spatial-trees/rplus-trees.lisp
/usr/share/common-lisp/source/spatial-trees/basedefs.lisp
/usr/share/common-lisp/source/spatial-trees/r-trees.lisp
/usr/share/common-lisp/source/spatial-trees/spatial-tree-viz.lisp
/usr/share/common-lisp/source/spatial-trees/package.lisp
/usr/share/common-lisp/source/spatial-trees/x-trees.lisp
/usr/share/doc/
/usr/share/doc/cl-spatial-trees/
/usr/share/doc/cl-spatial-trees/TODO
/usr/share/doc/cl-spatial-trees/copyright
/usr/share/doc/cl-spatial-trees/changelog.Debian.gz
/usr/share/doc/cl-spatial-trees/BUGS