Fix flake8 E302 in test_efp_data.py

TestProbesetConversion class definition was missing a blank line before
it, which flake8 was failing CI on.

Author: rmobmina

tests/services/test_efp_data.py

@@ -60,6 +60,7 @@ def test_invalid_gene_format(self):
         self.assertEqual(result["error_code"], 400)
         self.assertIn("Invalid Arabidopsis gene ID format", result["error"])
 
+
 class TestProbesetConversion(TestCase):
     """Verify that AGI → probeset conversion runs for all arabidopsis probeset databases.