Merge pull request #1388 from kylemcdonald/patch-1

typo in doc: batch_input_size => batch_input_shape

keras/layers/recurrent.py

@@ -73,7 +73,7 @@ class Recurrent(MaskedLayer):
         To enable statefulness:
             - specify `stateful=True` in the layer constructor.
             - specify a fixed batch size for your model, by passing
-                a `batch_input_size=(...)` to the first layer in your model.
+                a `batch_input_shape=(...)` to the first layer in your model.
                 This is the expected shape of your inputs *including the batch size*.
                 It should be a tuple of integers, e.g. `(32, 10, 100)`.