Consider using U+02BC (MODIFIER LETTER APOSTROPHE) for don't

[sethwoodworth]

https://tedclancy.wordpress.com/2015/06/03/which-unicode-character-should-represent-the-english-apostrophe-and-why-the-unicode-committee-is-very-wrong/

This article presents a strong case that using U+02BC for apostrophe is more correct than using U+2019 (RIGHT SINGLE QUOTATION MARK). Modifier letters are considered part of a word by a tokenizer and quotation marks should break a word in most tokenizers.