こんな感じのやつ
\xE3\x81\x99\xE3\x82\x82\xE3\x82\x82
標準出力が文字化けする場合
pではなくputsかprintを使う
正規表現とかがヒットしなくてこんなエラーが出る場合
incompatible encoding regexp match (UTF-8 regexp with ASCII-8BIT string) (Encoding::CompatibilityError)
String.force_encoding("UTF-8")を使う
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