message: Apply Debug and change constructor param type of SledStorage
diff: @@ -52,12 +52,13 @@ macro_rules! try_self {
  };
  }
  +#[derive(Debug)]
  pub struct SledStorage {
  tree: Db,
  }
  impl SledStorage {
  - pub fn new(filename: String) -> Result<Self> {
  + pub fn new(filename: &str) -> Result<Self> {
  let tree = try_into!(sled::open(filename));
  Ok(Self { tree })
  