Off by one bug in Neural language translation example

[eli7]

This line: https://github.com/tensorflow/skflow/blob/master/examples/neural_translation_word.py#L156
Is:
idx = random.randint(0, len(X_test))

From reading the help for randint, I think it should be:
idx = random.randint(0, len(X_test) - 1)

Also I got unlucky and got an index out of range exception :)