Default activation function in Keras

https://github.com/keras-team/keras/blob/master/keras/layers/recurrent.py#L2081

It mentions tanh here for version 2.3.0 :-)

Keras Recurrent is an abstact class for recurrent layers. In Keras 2.0 all default activations are linear for all implemented RNNs (LSTM, GRU and SimpleRNN). In previous versions you had:

• linear for SimpleRNN,
• tanh for LSTM and GRU.