/usr/share/octave/packages/quaternion-2.2.0/@quaternion/ is in octave-quaternion 2.2.0-1build1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/octave/packages/quaternion-2.2.0/@quaternion/abs.m
/usr/share/octave/packages/quaternion-2.2.0/@quaternion/arg.m
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