/usr/ is in octave-splines 1.0.7-3.
This file is owned by root:root, with mode 0o755.
..
/usr/share/
/usr/share/octave/
/usr/share/octave/packages/
/usr/share/octave/packages/3.2/
/usr/share/octave/packages/3.2/splines-1.0.7/
/usr/share/octave/packages/3.2/splines-1.0.7/catmullrom.m
/usr/share/octave/packages/3.2/splines-1.0.7/csape.m
/usr/share/octave/packages/3.2/splines-1.0.7/csapi.m
/usr/share/octave/packages/3.2/splines-1.0.7/fnder.m
/usr/share/octave/packages/3.2/splines-1.0.7/fnplt.m
/usr/share/octave/packages/3.2/splines-1.0.7/fnval.m
/usr/share/octave/packages/3.2/splines-1.0.7/packinfo/
/usr/share/octave/packages/3.2/splines-1.0.7/packinfo/DESCRIPTION
/usr/share/octave/packages/3.2/splines-1.0.7/packinfo/INDEX
/usr/share/octave/packages/3.2/splines-1.0.7/packinfo/.autoload
/usr/share/octave/packages/3.2/splines-1.0.7/doc-cache
/usr/share/doc/
/usr/share/doc/octave-splines/
/usr/share/doc/octave-splines/copyright
/usr/share/doc/octave-splines/changelog.Debian.gz