message: fix plotting example
diff: @@ -154,6 +154,7 @@ def main():
  board_shim = BoardShim(args.board_id, params)
  board_shim.prepare_session()
  board_shim.start_stream(450000, args.streamer_params)
  + Graph(board_shim)
  except BaseException:
  logging.warning('Exception', exc_info=True)
  finally:
  