/// Is the last tag that was added to the stream a new line (CR)? This is mostly to known
/// whether a new line must be added. Therefore, consider that an empty stream just had a CR,
/// that simplifies the logic using this code.
/// Is the last tag that was added to the stream a new line (CR)? This is mostly to known
/// whether a new line must be added. Therefore, consider that an empty stream just had a CR,
/// that simplifies the logic using this code.