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Aside: In a regex, * is not a wildcard in the sense you seem to be using it; it's a quantifier.
. is a wildcard and a character class may well be regarded as a (restricted) wildcard. Re your underlying question, the dot_star is perhaps the most general regex, precisely because it is minimally specific... Suggest meditating on Roy Johnson's view In reply to Re: Most specific pattern
by ww
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