# File lib/www/mechanize/util.rb, line 13
        def build_query_string(parameters, enc=nil)
          parameters.map { |k,v|
            if k
              # WEBrick::HTTP.escape* has some problems about m17n on ruby-1.9.*.
              [CGI.escape(k.to_s), CGI.escape(v.to_s)].join("=")
??

            end
          }.compact.join('&')
        end