Undo unintended code whitespace change.

Author: aunzat

Lib/test/test_filecmp.py

@@ -321,5 +321,6 @@ def _assert_report(self, dircmp_report, expected_report_lines):
             report_lines = stdout.getvalue().strip().split('\n')
             self.assertEqual(report_lines, expected_report_lines)
 
+
 if __name__ == "__main__":
     unittest.main()