TXT_BS
'!', TXT_BS | TXT_CR | TXT_ESCAPE | TXT_FILEC | TXT_PROMPT))
TXT_BS | TXT_CEDIT | TXT_FILEC | TXT_PROMPT))
TXT_BS | TXT_CR | TXT_ESCAPE | TXT_PROMPT |
if (tp->cno <= tp->offset && LF_ISSET(TXT_BS)) {