Apply suggestion from @picnixz

Fix formatting according to PEP 8

Co-authored-by: Bénédikt Tran <10796600+picnixz@users.noreply.github.com>

Author: Bolotnyj

Lib/test/test_filecmp.py

@@ -443,7 +443,7 @@ def fake_stat(path, *args, **kwargs):
 
         with patch("os.stat", side_effect=fake_stat):
             dc = filecmp.dircmp(self.dir, self.dir_same)
-            self.assertIn(trigger_file, dc.common_funny)
+        self.assertIn(trigger_file, dc.common_funny)
 
     # Test common_funny layout with regular files, directories, and sockets.
     # 'diff_type.txt' is a directory in one path and a regular file in another.