message: Add a missing left bracket in comments
diff: @@ -175,7 +175,7 @@ def stack_bidirectional_dynamic_rnn(cells_fw,
  Returns:
  A tuple (outputs, output_state_fw, output_state_bw) where:
  outputs: Output `Tensor` shaped:
  - `batch_size, max_time, layers_output]`. Where layers_output
  + `[batch_size, max_time, layers_output]`. Where layers_output
  are depth-concatenated forward and backward outputs.
  output_states_fw is the final states, one tensor per layer,
  of the forward rnn.
  