Fix flake8 warnings

Author: MDUYN

investing_algorithm_framework/services/data_providers/data_provider_service.py

@@ -327,7 +327,8 @@ def get(self, data_source: DataSource) -> Optional[DataProvider]:
         Get a registered data provider by its data source.
 
         Args:
-            data_source (DataSource): The data source to get the data provider for.
+            data_source (DataSource): The data source to get the
+            data provider for.
 
         Returns:
             Optional[DataProvider]: The registered data provider for