src/transformers/models/mluke/tokenization_mluke.py/MLukeTokenizer/convert_tokens_to_string
class MLukeTokenizer:    def convert_tokens_to_string(self, tokens):
        """Converts a sequence of tokens (strings for sub-words) in a single string."""
        out_string = "".join(tokens).replace(SPIECE_UNDERLINE, " ").strip()
        return out_string