message: Fixed comment to the index accessor
diff: @@ -348,9 +348,7 @@ impl IndexWriter {
  self.operation_sender = sender;
  }
  - /// Accessor to the index
  - ///
  - /// The index is actually cloned.
  + /// Accessor to the index.
  pub fn index(&self) -> &Index {
  &self.index
  }
  