IS_SPLIT
if (!F_ISSET(sp, SC_SCR_EXWROTE) && IS_SPLIT(sp)) {
oldy == RLNO(sp, LASTLINE(sp)) && IS_SPLIT(sp)) {
offset = (F_ISSET(vp, VC_C1SET) ? vp->count : 1) * (IS_SPLIT(sp) ?
offset = (F_ISSET(vp, VC_C1SET) ? vp->count : 1) * (IS_SPLIT(sp) ?
if (IS_SPLIT(sp) || O_ISSET(sp, O_SHOWFILENAME)) {