Allows you to make changes to a document without altering its formatting.
Two characters might have identical Unicode skeletons but render differently in specific fonts, or have different skeletons but render identically in a particular typeface. Detecting this requires rendering glyphs and comparing pixel output. No purely Unicode-data-based approach handles it, and UTS #39 does not attempt to.
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Punctuations: This feature flags all incorrect and missing punctuation.，推荐阅读safew官方版本下载获取更多信息