/usr/share/octave/packages/3.2/optim-1.0.17/private/ is in octave-optim 1.0.17-1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/octave/packages/3.2/optim-1.0.17/private/__collect_constraints__.m
/usr/share/octave/packages/3.2/optim-1.0.17/private/__covd_wls__.m
/usr/share/octave/packages/3.2/optim-1.0.17/private/__covp_corp_wls__.m
/usr/share/octave/packages/3.2/optim-1.0.17/private/__dfdp__.m
/usr/share/octave/packages/3.2/optim-1.0.17/private/__lm_svd__.m
/usr/share/octave/packages/3.2/optim-1.0.17/private/__nonlin_residmin__.m
/usr/share/octave/packages/3.2/optim-1.0.17/private/__null_optim__.m
/usr/share/octave/packages/3.2/optim-1.0.17/private/__plot_cmds__.m
/usr/share/octave/packages/3.2/optim-1.0.17/private/__residmin_stat__.m
/usr/share/octave/packages/3.2/optim-1.0.17/private/optim_problems_p_r_y.data