diff -r 57875cf423c9 -r 2372284d9457 tests/test-mdiff.py
--- a/tests/test-mdiff.py	Sat Oct 05 10:29:34 2019 -0400
+++ b/tests/test-mdiff.py	Sun Oct 06 09:45:02 2019 -0400
@@ -3,22 +3,23 @@
 
 import unittest
 
-from mercurial import (
-    mdiff,
-)
+from mercurial import mdiff
+
 
 class splitnewlinesTests(unittest.TestCase):
-
     def test_splitnewlines(self):
-        cases = {b'a\nb\nc\n': [b'a\n', b'b\n', b'c\n'],
-                 b'a\nb\nc': [b'a\n', b'b\n', b'c'],
-                 b'a\nb\nc\n\n': [b'a\n', b'b\n', b'c\n', b'\n'],
-                 b'': [],
-                 b'abcabc': [b'abcabc'],
-                 }
+        cases = {
+            b'a\nb\nc\n': [b'a\n', b'b\n', b'c\n'],
+            b'a\nb\nc': [b'a\n', b'b\n', b'c'],
+            b'a\nb\nc\n\n': [b'a\n', b'b\n', b'c\n', b'\n'],
+            b'': [],
+            b'abcabc': [b'abcabc'],
+        }
         for inp, want in cases.items():
             self.assertEqual(mdiff.splitnewlines(inp), want)
 
+
 if __name__ == '__main__':
     import silenttestrunner
+
     silenttestrunner.main(__name__)