[libclang/python][NFC] Fix formatting in test_file (llvm#145773)

Author: DeinAlptraum

clang/test/bindings/python/tests/cindex/test_file.py

@@ -9,6 +9,7 @@
 
 inputs_dir = os.path.join(os.path.dirname(__file__), "INPUTS")
 
+
 class TestFile(unittest.TestCase):
     def test_file(self):
         index = Index.create()