Separate Normalization from Splitting in ByteLevel tokenizers

This note is wrong! This was revealed to me by Sasuke___420 . As it turns out, the regex does not work the same as the original one, specifically for non-ascii spaces. Upon further reflection, I don’t think you should really use this. This is a short note to dissuade you from using a ByteLevel pretokenizer in your tokenizers. The ByteLevel pretokenizer, as implemented in Hugging Face tokenizers…