set_left_margin_parm
#if defined(set_left_margin_parm) && defined(set_right_margin_parm)
if (VALID_STRING(set_left_margin_parm)
need_flush |= sent_string(TIPARM_1(set_left_margin_parm, 0));
#ifdef set_left_margin_parm
&& !VALID_STRING(set_left_margin_parm))