     ]
    },
    {
     "cell_type": "code",
     "execution_count": null,
     "metadata": {
      "collapsed": true
     },
     "outputs": [],
     "source": [
 
</s> remove    "execution_count": null,
 </s> add    "execution_count": 2, </s> remove    "execution_count": null,
 </s> add    "execution_count": 1, </s> remove     "collapsed": false
 </s> add     "collapsed": true </s> remove     "collapsed": true
 </s> add     "collapsed": false
   "execution_count": 3,
     ]
    },
    {
     "cell_type": "code",
   "execution_count": 3,
     "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 code and unit test. 
sorting-searching/quick-sort.ipynb