# File lib/kaminari/helpers/sinatra_helpers.rb, line 114
      def link_to_previous_page(scope, name, options = {})
        params = options.delete(:params) || (Rack::Utils.parse_query(env['QUERY_STRING']).symbolize_keys rescue {})
        param_name = options.delete(:param_name) || Kaminari.config.param_name
        placeholder = options.delete(:placeholder)

        unless scope.first_page?
          query = params.merge(param_name => scope.prev_page)
          link_to name, env['PATH_INFO'] + (query.empty? ? '' : "?#{query.to_query}"), options.reverse_merge(:rel => 'previous')
        else
          placeholder.to_s.html_safe
        end
      end