TabWidth         4432 src/term.c       TabWidth (tty) = tgetnum ("tw");
TabWidth         4442 src/term.c       if (TabWidth (tty) < 0)
TabWidth         4443 src/term.c         TabWidth (tty) = 8;
TabWidth         4522 src/term.c       UseTabs (tty) = tabs_safe_p (fileno (tty->input)) && TabWidth (tty) == 8;