/usr/share/tcltk/tcllib1.16/doctools2toc/ is in tcllib 1.16-dfsg-2.
This file is owned by root:root, with mode 0o755.
..
/usr/share/tcltk/tcllib1.16/doctools2toc/container.tcl
/usr/share/tcltk/tcllib1.16/doctools2toc/export.tcl
/usr/share/tcltk/tcllib1.16/doctools2toc/export_doctoc.tcl
/usr/share/tcltk/tcllib1.16/doctools2toc/export_html.tcl
/usr/share/tcltk/tcllib1.16/doctools2toc/export_json.tcl
/usr/share/tcltk/tcllib1.16/doctools2toc/export_nroff.tcl
/usr/share/tcltk/tcllib1.16/doctools2toc/export_text.tcl
/usr/share/tcltk/tcllib1.16/doctools2toc/export_wiki.tcl
/usr/share/tcltk/tcllib1.16/doctools2toc/import.tcl
/usr/share/tcltk/tcllib1.16/doctools2toc/import_doctoc.tcl
/usr/share/tcltk/tcllib1.16/doctools2toc/import_json.tcl
/usr/share/tcltk/tcllib1.16/doctools2toc/msgcat_c.tcl
/usr/share/tcltk/tcllib1.16/doctools2toc/msgcat_de.tcl
/usr/share/tcltk/tcllib1.16/doctools2toc/msgcat_en.tcl
/usr/share/tcltk/tcllib1.16/doctools2toc/msgcat_fr.tcl
/usr/share/tcltk/tcllib1.16/doctools2toc/parse.tcl
/usr/share/tcltk/tcllib1.16/doctools2toc/pkgIndex.tcl
/usr/share/tcltk/tcllib1.16/doctools2toc/structure.tcl