message: Fix release mode tests
  Fixes
diff: @@ -317,6 +317,7 @@ mod tests {
  #[test]
  #[should_panic]
  + #[cfg(debug_assertions)]
  fn indexing_above_inner_len() {
  let storage = Storage::<char>::with_capacity(1, 1);
  let _ = &storage[Line(-1)];
  