Hello. I have a question about a general understanding of how transformers work. The tokenizer feeds the model text, which is usually normalized, cleared of punctuation, and so on. But as I assume the transformer is trained on a raw corpus - I made this conclusion after seeing the single characters in the vocabulary. Hence the question - should I normalize and do other preprocessing of the sentences for which I want to get embbedings? If the model was trained on the raw corpus, how correct will the preprocessing described above be for the text under study?