Fix E303 too many blank lines in doi_database_test.py

Author: jordanpadams

src/pds_doi_service/core/db/test/doi_database_test.py

@@ -248,7 +248,6 @@ def test_query_by_wildcard(self):
         # Should only match two DOI's
         self.assertEqual(len(o_query_result[-1]), 2)
 
-
     def test_datapaper_type_roundtrip(self):
         """Test that ProductType.DataPaper can be stored and retrieved without corruption.
 
@@ -320,7 +319,5 @@ def test_unknown_product_type_roundtrip(self):
         self._doi_database.close_database()
 
 
-
-
 if __name__ == '__main__':
     unittest.main()