# File lib/mail/version_specific/ruby_1_8.rb, line 63
    def Ruby18.q_value_decode(str)
      match = str.match(/\=\?(.+)?\?[Qq]\?(.+)?\?\=/m)
      if match
        encoding = match[1]
        str = Encodings::QuotedPrintable.decode(match[2])
      end
      str
    end