/usr/share/tcltk/tklib0.6/widget/ is in tklib 0.6-2.
This file is owned by root:root, with mode 0o755.
..
/usr/share/tcltk/tklib0.6/widget/arrowb.tcl
/usr/share/tcltk/tklib0.6/widget/calendar.tcl
/usr/share/tcltk/tklib0.6/widget/dateentry.tcl
/usr/share/tcltk/tklib0.6/widget/dialog.tcl
/usr/share/tcltk/tklib0.6/widget/mentry.tcl
/usr/share/tcltk/tklib0.6/widget/panelframe.tcl
/usr/share/tcltk/tklib0.6/widget/pkgIndex.tcl
/usr/share/tcltk/tklib0.6/widget/ruler.tcl
/usr/share/tcltk/tklib0.6/widget/scrollw.tcl
/usr/share/tcltk/tklib0.6/widget/statusbar.tcl
/usr/share/tcltk/tklib0.6/widget/stext.tcl
/usr/share/tcltk/tklib0.6/widget/superframe.tcl
/usr/share/tcltk/tklib0.6/widget/toolbar.tcl
/usr/share/tcltk/tklib0.6/widget/widget.tcl
/usr/share/tcltk/tklib0.6/widgetl/listentry.tcl
/usr/share/tcltk/tklib0.6/widgetl/listsimple.tcl
/usr/share/tcltk/tklib0.6/widgetl/pkgIndex.tcl
/usr/share/tcltk/tklib0.6/widgetv/pkgIndex.tcl
/usr/share/tcltk/tklib0.6/widgetv/validator.tcl