Mistake in vocab.py?

[changt]

Should

        worddict['<PAD>'] = 0
        worddict['<UNK>'] = 1
        worddict['<S>'] = 1
        worddict['</S>'] = 1

be

        worddict['<PAD>'] = 0
        worddict['<UNK>'] = 1
        worddict['<S>'] = 2
        worddict['</S>'] = 3