TabWidth         4343 src/term.c       TabWidth (tty) = tgetnum ("tw");
TabWidth         4353 src/term.c       if (TabWidth (tty) < 0)
TabWidth         4354 src/term.c         TabWidth (tty) = 8;
TabWidth         4433 src/term.c       UseTabs (tty) = tabs_safe_p (fileno (tty->input)) && TabWidth (tty) == 8;