/usr/share/tcltk/tcllib1.16/pt/ is in tcllib 1.16-dfsg-2.
This file is owned by root:root, with mode 0o755.
..
/usr/share/tcltk/tcllib1.16/pt/char.tcl
/usr/share/tcltk/tcllib1.16/pt/configuration.tcl
/usr/share/tcltk/tcllib1.16/pt/paths.tcl
/usr/share/tcltk/tcllib1.16/pt/pkgIndex.tcl
/usr/share/tcltk/tcllib1.16/pt/pt_astree.tcl
/usr/share/tcltk/tcllib1.16/pt/pt_cparam_config_critcl.tcl
/usr/share/tcltk/tcllib1.16/pt/pt_parse_peg.tcl
/usr/share/tcltk/tcllib1.16/pt/pt_parse_peg_c.tcl
/usr/share/tcltk/tcllib1.16/pt/pt_parse_peg_tcl.tcl
/usr/share/tcltk/tcllib1.16/pt/pt_peg_container.tcl
/usr/share/tcltk/tcllib1.16/pt/pt_peg_container_peg.tcl
/usr/share/tcltk/tcllib1.16/pt/pt_peg_export.tcl
/usr/share/tcltk/tcllib1.16/pt/pt_peg_export_container.tcl
/usr/share/tcltk/tcllib1.16/pt/pt_peg_export_json.tcl
/usr/share/tcltk/tcllib1.16/pt/pt_peg_export_peg.tcl
/usr/share/tcltk/tcllib1.16/pt/pt_peg_from_json.tcl
/usr/share/tcltk/tcllib1.16/pt/pt_peg_from_peg.tcl
/usr/share/tcltk/tcllib1.16/pt/pt_peg_import.tcl
/usr/share/tcltk/tcllib1.16/pt/pt_peg_import_json.tcl
/usr/share/tcltk/tcllib1.16/pt/pt_peg_import_peg.tcl
/usr/share/tcltk/tcllib1.16/pt/pt_peg_interp.tcl
/usr/share/tcltk/tcllib1.16/pt/pt_peg_op.tcl
/usr/share/tcltk/tcllib1.16/pt/pt_peg_to_container.tcl
/usr/share/tcltk/tcllib1.16/pt/pt_peg_to_cparam.tcl
/usr/share/tcltk/tcllib1.16/pt/pt_peg_to_json.tcl
/usr/share/tcltk/tcllib1.16/pt/pt_peg_to_param.tcl
/usr/share/tcltk/tcllib1.16/pt/pt_peg_to_peg.tcl
/usr/share/tcltk/tcllib1.16/pt/pt_peg_to_tclparam.tcl
/usr/share/tcltk/tcllib1.16/pt/pt_pegrammar.tcl
/usr/share/tcltk/tcllib1.16/pt/pt_pexpr_op.tcl
/usr/share/tcltk/tcllib1.16/pt/pt_pexpression.tcl
/usr/share/tcltk/tcllib1.16/pt/pt_pgen.tcl
/usr/share/tcltk/tcllib1.16/pt/pt_rdengine.tcl
/usr/share/tcltk/tcllib1.16/pt/pt_rdengine_c.tcl
/usr/share/tcltk/tcllib1.16/pt/pt_rdengine_oo.tcl
/usr/share/tcltk/tcllib1.16/pt/pt_rdengine_tcl.tcl
/usr/share/tcltk/tcllib1.16/pt/pt_tclparam_config_snit.tcl
/usr/share/tcltk/tcllib1.16/pt/pt_tclparam_config_tcloo.tcl
/usr/share/tcltk/tcllib1.16/pt/text_write.tcl