src/transformers/models/wav2vec2/tokenization_wav2vec2.py/Wav2Vec2CTCTokenizer/prepare_for_tokenization
class Wav2Vec2CTCTokenizer:    def prepare_for_tokenization(self, text, is_split_into_words=False, **kwargs):
        if is_split_into_words:
            text = " " + text
        return (text, kwargs)