fix.rb

module OAuth::RequestProxy::Net
  module HTTP
    class HTTPRequest < OAuth::RequestProxy::Base
      def query_string
        params = [ query_params, auth_header_params ]
        params << post_params if
          ['POST', 'PUT'].include?(method.to_s.upcase) && form_url_encoded?
        params.compact.join('&')
      end
    end
  end
end