docs: def detokenize(self, inputs, delim=' '):
          """
          Detokenizes single sentence and removes token separator characters.
  
          :param inputs: sequence of tokens
          :param delim: tokenization delimiter
  
          returns: string representing detokenized sentence
          """
          detok = delim.join([self.idx2tok[idx] for idx in inputs])
          detok = detok.replace(self.separator + ' ', '')
          detok = detok.replace(self.separator, '')
  
          detok = detok.replace(config.BOS_TOKEN, '')
          detok = detok.replace(config.EOS_TOKEN, '')
          detok = detok.replace(config.PAD_TOKEN, '')
          detok = detok.strip()
          return detok