Xlm-roberta Tokenizer split special symbol and under bar
Hello. I’m a beginner of NLP.My question is why xlm-roberta-base Tokenizer split special symbol and under bar. For example,tokenizer = AutoTokenizer.from_pretrained("xlm-roberta-base")
tokenizer.tokenize(',')
>>> ['▁', ',']tokenizer.tokenize('.')
>>>  ['▁', '.']tokenizer.tokenize('\\')
>>>['▁', '\\']I check other special symbol but, It’s ok like['_!']. I don’t understand why these special symbol are splited. Please why and how solve this problem!