Ask for advice on exact requirements to fix #699 mixed CJK numbers

[outdream]

Thanks for your patience.
I'm still confused of what I should do next.

If it's not worth changing anything here as it's a rare case,
sorry for my PR to github before the reply,
maybe you need to close it on github.

For another case, should I optimize current code with
replacing set to a static array?
Or rollback current modification to cjk-tokenizer and
try to do some work with the stemming?


Cheers,
outdream
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