[fix] pep8

searx/results.py

         resultnum_sum = sum(self._number_of_results)
         if not resultnum_sum or not self._number_of_results:
             return 0
-        return resultnum_sum  / len(self._number_of_results)
+        return resultnum_sum / len(self._number_of_results)

searx/webapp.py

 
     plugins.call('post_search', request, locals())
 
-    results =  search.result_container.get_ordered_results()
+    results = search.result_container.get_ordered_results()
 
     for result in results: