Re: [whatwg/encoding] If gb18030 is revised, consider aligning the Encoding Standard (#27)

All 24 characters in question are either compatibility characters (vertical forms of punctuation that are normally accessible via their horizontal counterparts and the 'vert' GSUB feature) or ideograph components that were encoded as stand-alone ideographs. This means that the chance of encountering them in the wild, in genuine documents, is somewhere between very slim and none.

Besides, supporting PUA code points in the context of the _Noto CJK_ and _Source Han_ fonts is a total non-starter, mainly because they are Pan-CJK typefaces, and PUA usage is extremely dangerous in such contexts.

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