Replace older exception formatting with f-strings

djangosaml2/backends.py

@@ -284,9 +284,7 @@ def get_or_create_user(
             user = UserModel.objects.get(**user_query_args)
         except MultipleObjectsReturned:
             logger.error(
-                "Multiple users match, model: %s, lookup: %s",
-                UserModel._meta,
-                user_query_args,
+                f"Multiple users match, model: {UserModel._meta}, lookup: {user_query_args}",
             )
         except UserModel.DoesNotExist:
             # Create new one if desired by settings

djangosaml2/views.py

@@ -808,7 +808,7 @@ def do_logout_service(self, request, data, binding):
                 )
             except StatusError as e:
                 response = None
-                logger.warning("Error logging out from remote provider: " + str(e))
+                logger.warning(f"Error logging out from remote provider: {e}")
             state.sync()
             return finish_logout(request, response)