Fix linting errors: add trailing newlines to all source files

src/testdatagen/utils/__init__.py

@@ -1 +1 @@
-"""Utils package for TestDataGen."""
+"""Utils package for TestDataGen."""

src/testdatagen/utils/testdata_provider.py

@@ -333,4 +333,4 @@ class TestDataProvider(BaseProvider):
         for prop_name, prop_schema in properties.items():
             result[prop_name] = self.json_schema_type(prop_schema, faker_instance)
 
-        return result
+        return result