TTYC_ECH
if (tty_term_has(tty->term, TTYC_ECH)) {
tty_putcode_i(tty, TTYC_ECH, nx);
[TTYC_ECH] = { TTYCODE_STRING, "ech" },
if (tty_term_has(tty->term, TTYC_ECH)) {
tty_putcode_i(tty, TTYC_ECH, nx);