Fix code style

Author: fchollet

keras/src/layers/rnn/simple_rnn.py

@@ -256,7 +256,7 @@ class SimpleRNN(RNN):
             If `True`, process the input sequence backwards and return the
             reversed sequence.
         stateful: Boolean (default: `False`). If `True`, the last state
-            for each sample at index i in a batch will be used as the 
+            for each sample at index i in a batch will be used as the
             initial state for the sample of index i in the following batch.
         unroll: Boolean (default: `False`).
             If `True`, the network will be unrolled,