/usr/share/octave/packages/splines-1.2.7/ is in octave-splines 1.2.7-2.
This file is owned by root:root, with mode 0o755.
..
/usr/share/octave/packages/splines-1.2.7/bin_values.m
/usr/share/octave/packages/splines-1.2.7/catmullrom.m
/usr/share/octave/packages/splines-1.2.7/csape.m
/usr/share/octave/packages/splines-1.2.7/csapi.m
/usr/share/octave/packages/splines-1.2.7/csaps.m
/usr/share/octave/packages/splines-1.2.7/csaps_sel.m
/usr/share/octave/packages/splines-1.2.7/dedup.m
/usr/share/octave/packages/splines-1.2.7/doc-cache
/usr/share/octave/packages/splines-1.2.7/fnder.m
/usr/share/octave/packages/splines-1.2.7/fnplt.m
/usr/share/octave/packages/splines-1.2.7/fnval.m
/usr/share/octave/packages/splines-1.2.7/packinfo/
/usr/share/octave/packages/splines-1.2.7/packinfo/.autoload
/usr/share/octave/packages/splines-1.2.7/packinfo/DESCRIPTION
/usr/share/octave/packages/splines-1.2.7/packinfo/INDEX
/usr/share/octave/packages/splines-1.2.7/packinfo/NEWS
/usr/share/octave/packages/splines-1.2.7/tpaps.m
/usr/share/octave/packages/splines-1.2.7/tps_val.m