def clean_up_tokenization(out_string):
            """ Clean up a list of simple English tokenization artifacts
            like spaces before punctuations and abreviated forms.
            """
            out_string = (
                out_string.replace(' .', '.').replace(' ?', '?').replace(
                    ' !', '!').replace(' ,', ',').replace(" ' ", "'").replace(
                        " n't", "n't").replace(" 'm", "'m").replace(
                            " 's", "'s").replace(" 've",
                                                 "'ve").replace(" 're", "'re"))
            return out_string
 Clean up a list of simple English tokenization artifacts
            like spaces before punctuations and abreviated forms.
            
bert_tokenizer.py