     ]
    },
    {
     "cell_type": "code",
     "execution_count": null,
     "metadata": {
      "collapsed": true
     },
     "outputs": [],
     "source": [
 
</s> remove    "execution_count": null,
 </s> add    "execution_count": 1, </s> remove     "collapsed": true
 </s> add     "collapsed": false </s> remove    "outputs": [],
 </s> add    "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "Empty input\n",
      "One element\n",
      "Two or more elements\n",
      "Success: test_insertion_sort\n"
     ]
    }
   ], </s> remove     "## Clarifying Questions\n",
 </s> add     "## Constraints and Assumptions\n",
   "execution_count": 2,
     ]
    },
    {
     "cell_type": "code",
   "execution_count": 2,
     "metadata": {
      "collapsed": true
     },
     "outputs": [],
     "source": [
keep keep keep keep replace keep keep keep keep keep
 Reworked notebook: Added more detail to constraints and test cases.  Reworked unit test. 
sorting-searching/insertion-sort.ipynb