message: Updating some doc.
diff: @@ -680,9 +680,6 @@ impl IndexWriter {
  /// The opstamp is an increasing `u64` that can
  /// be used by the client to align commits with its own
  /// document queue.
  - ///
  - /// Currently it represents the number of documents that
  - /// have been added since the creation of the index.
  pub fn add_document(&self, document: Document) -> Opstamp {
  let opstamp = self.stamper.stamp();
  let add_operation = AddOperation { opstamp, document };
  