code: function sc_minus(x) {
      if (arguments.length === 1)
  	return -x;
      else {
  	var res = x;
  	for (var i = 1; i < arguments.length; i++)
  	    res -= arguments[i];
  	return res;
      }
  }
docs: * META ((export - -fx -fl)
  (peephole (minus)))