--- Regexp.escape(string[,kcode])
--- Regexp.quote(string[,kcode])

    string ɽˤ̤ʰ̣ʸľ˥
    ʸ(Хåå)ʸ֤ޤάǽ
    ʰ kcode ʸʸɤꤷޤ
    (ά $KCODE ͤѤޤ)

    ʸɤλ $KCODE Ʊͤ˹Ԥޤ

