      "* [Algorithm](#Algorithm)\n",
      "* [Code](#Code)\n",
      "* [Pythonic-Code](#Pythonic-Code)"
     ]
    },
    {
 
</s> remove     "* [Clarifying Questions](#Clarifying-Questions)\n",
 </s> add     "* [Constraints and Assumptions](#Constraints-and-Assumptions)\n", </s> remove     "## Clarifying Questions\n",
 </s> add     "## Constraints and Assumptions\n",
    "\n",
    "*Problem statements are often intentionally ambiguous.  Identifying constraints and stating assumptions can help to ensure you code the intended solution.*\n", </s> remove    "execution_count": null,
 </s> add    "execution_count": 3, </s> remove    "execution_count": null,
 </s> add    "execution_count": 2, </s> remove    "execution_count": null,
 </s> add    "execution_count": 1,
    "* [Unit Test](#Unit-Test)\n",
      "* [Algorithm](#Algorithm)\n",
      "* [Code](#Code)\n",
    "* [Unit Test](#Unit-Test)\n",
      "* [Pythonic-Code](#Pythonic-Code)"
     ]
    },
    {
keep add keep keep keep keep
 Reworked notebook: Added more detail to constraints and test cases.  Reworked unit test.  Added linebreak to comment about naming clash with queue. 
stacks-queues/queue-list.ipynb