message: Add a ref in forward_scalar_val_ref_binop_to_ref_val
diff: @@ -204,7 +204,7 @@ macro_rules! forward_scalar_val_ref_binop_to_ref_val {
  #[inline]
  fn $method(self, other: $res) -> $res {
  - $imp::$method(*self, other)
  + $imp::$method(*self, &other)
  }
  }
  };
  