# File lib/active_support/core_ext/uri.rb, line 10
      def unescape(str, escaped = @regexp[:ESCAPED])
        enc = (str.encoding == Encoding::US_ASCII) ? Encoding::UTF_8 : str.encoding
        str.gsub(escaped) { [$&[1, 2].hex].pack('C') }.force_encoding(enc)
      end