Request unescapes redirected action

And this could potentially cause problems if the redirected action has some escaped information... not entirely sure if that will be the case or not but it is notable that the test links fail without this patch:

          # make action relative to host
          action, query = action.split('?', 2)
          uri = URI.parse(hash['headers']['Referer'].to_s)
          uri.path = action
          uri.query = query.gsub(/\s/, "+")
          uri.to_s

Perhaps parse the query string on the redirected uri and rebuild.