[Chore] Linted Files (#150)

Co-authored-by: Tim Lorsbach <tim@lorsba.ch>
Reviewed-on: enviPath/enviPy#150

tests/test_formatconverter.py

@@ -4,8 +4,7 @@ from utilities.chem import FormatConverter
 
 
 class FormatConverterTestCase(TestCase):
-
     def test_standardization(self):
-        smiles = 'C[n+]1c([N-](C))cccc1'
+        smiles = "C[n+]1c([N-](C))cccc1"
         standardized_smiles = FormatConverter.standardize(smiles)
-        self.assertEqual(standardized_smiles, 'CN=C1C=CC=CN1C')
+        self.assertEqual(standardized_smiles, "CN=C1C=CC=CN1C")