revert accidental breakage of unit test

Author: hjwp

tests/test_book_tester.py

@@ -600,8 +600,7 @@ def test_only_ignores_exactly_32_char_strings_no_whitespace(self):
 
     def test_ignores_docker_image_ids_and_creation_time(self):
         actual = "superlists   latest    522824a399de   2 weeks ago     164MB"
-        expected = Output("superlists   latest    622824a399de   2 minutes ago   164MB")
-        actual = "superlists                            latest    4856d33cf356   55 minutes ago   167MB"
+        expected = Output("superlists   latest    522824a399de   2 minutes ago   164MB")
         self.assert_console_output_correct(actual, expected)
         self.assertTrue(expected.was_checked)
         with self.assertRaises(AssertionError):