while (! CIRBUF_IS_EMPTY(&rdl->left) && isblank2(cirbuf_get_tail(&rdl->left))) {
rdline_puts(rdl, vt100_bs);
cirbuf_del_tail(&rdl->left);
while (! CIRBUF_IS_EMPTY(&rdl->left) && isblank2(cirbuf_get_tail(&rdl->left))) {
rdline_puts(rdl, vt100_bs);
cirbuf_del_tail(&rdl->left);