make the comment match the code..

ui/cli.py

@@ -872,7 +872,7 @@ class _TestCases(unittest.TestCase):
 				with self.assertRaises(SystemExit) as cm:
 					main()
 
-				# with error code 5
+				# with error code 1
 				self.assertEqual(cm.exception[0], 1)
 
 				# and outputs an error message