title: Does tf.nn.softmax_cross_entropy_with_logits account for batch size?
body: <p>Does <code>tf.nn.softmax_cross_entropy_with_logits</code> account for batch size?</p>
  
  <p>In my LSTM network, I feed batches of different sizes, and I would like to know whether or not I should normalize error with respect to batch size before optimizing.</p>