Source code is
if (this_arrow->type == arrow_end_absolute) {
fputs(" to ", fp);
save_position(fp, &this_arrow->end, 3, FALSE);
} else if (this_arrow->type == arrow_end_absolute) {
fputs(" rto ", fp);
save_position(fp, &this_arrow->end, 3, FALSE);
2nd one should be testing against arrow_end_relative
fixed