 `add_prefix_space=True` option in the BPE tokenizer 
Hello,
I understand that when I add the `add_prefix_space=True` option in the BPE tokenizer statement, the tokenizer will add a space in the beginning of every sequence.

Is there some specific advantages of using the `add_prefix_space=True` option for BPE tokenizer (compared to when I don't use the option), given that all my sequences start without a space in the beginning.?

Thanks,
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