#3482 Fix flake8

Author: sergisiso

src/psyclone/tests/utils_test.py

@@ -359,7 +359,7 @@ def func(basic: bool,
         if "any_length" == k:
             anno = stringify_annotation(v.annotation)
             assert "tuple[int, ...]" == anno
-            
+
         if "custom_class" == k:
             anno = stringify_annotation(v.annotation)
             assert "Transformation" == anno
@@ -368,6 +368,7 @@ def func(basic: bool,
             anno = stringify_annotation(v.annotation)
             assert "Transformation" == anno
 
+
 def test_transformation_doc_wrapper_subtrans():
     '''Test the transformation doc wrapper works correctly for
     subtransformations.'''