Line Dance

18/06/2015
/***********************************************************************
                             Line Dance
 ***********************************************************************/

/* Perform an insert-lines or delete-lines operation, inserting N
   lines or deleting -N lines at vertical position VPOS.  */

static void
x_ins_del_lines (struct frame *f, int vpos, int n)
{
  emacs_abort ();
}

No comment.