old_pos          1234 src/simh/linehistory.c   size_t old_pos = l->pos;
old_pos          1245 src/simh/linehistory.c   diff = old_pos - l->pos;
old_pos          1246 src/simh/linehistory.c   memmove(l->buf + l->pos, l->buf + old_pos, l->len - old_pos + 1);