Bug Report

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Describe the current, buggy behavior

wp db search '\p{Cf}' --regex

Regexp search for character classes finds individual bytes of an UTF-8 encoded character.
e.g. í in "hírlevél"
the result is displayed like "blog h▒▒rlevél feliratkozás"

How to search in UTF-8 encoded text?

BTW wp db search "$(printf '\xc3')" --regex also finds the first byte of í (actually all characters encoded on two bytes)