message: Update code to make clippy happy
diff: @@ -186,15 +186,15 @@ mod tests {
  assert_eq!(res[0], (b"bar".to_vec(), b"none".to_vec()));
  // make sure start and end are applied properly
  - let res: Vec<Pair> = range_with_prefix(
  + let res_count = range_with_prefix(
  &storage,
  &prefix,
  Some(b"bas"),
  Some(b"sno"),
  Order::Ascending,
  )
  - .collect();
  - assert_eq!(res.len(), 0);
  + .count();
  + assert_eq!(res_count, 0);
  let res: Vec<Pair> =
  range_with_prefix(&storage, &prefix, Some(b"ant"), None, Order::Ascending).collect();
  