Fixed some mistakes in examples

Fixed mistakes in LSTMCell and GRUCell examples.

Author: yunjey

torch/nn/modules/rnn.py

@@ -441,7 +441,7 @@ class LSTMCell(RNNCellBase):
  >>> cx = Variable(torch.randn(3, 20))
  >>> output = []
  >>> for i in range(6):
- ... hx, cx = rnn(input, (hx, cx))
+ ... hx, cx = rnn(input[i], (hx, cx))
  ... output.append(hx)
  """
 
@@ -510,8 +510,8 @@ class GRUCell(RNNCellBase):
  >>> hx = Variable(torch.randn(3, 20))
  >>> output = []
  >>> for i in range(6):
- ... hx = rnn(input, hx)
- ... output[i] = hx
+ ... hx = rnn(input[i], hx)
+ ... output.append(hx)
  """
 
  def __init__(self, input_size, hidden_size, bias=True):