     "metadata": {},
     "source": [
      "## Problem: Implement quick sort.\n",
      "\n",
      "* [Constraints and Assumptions](#Constraints-and-Assumptions)\n",
      "* [Test Cases](#Test-Cases)\n",
      "* [Algorithm](#Algorithm)\n",
      "* [Code](#Code)\n",
      "* [Unit Test](#Unit-Test)\n",
      "* [Pythonic-Code](#Pythonic-Code)"
 
</s> remove     "* [Constraints and Assumptions](#Constraints-and-Assumptions)\n",
 </s> add     "* [Constraints](#Constraints)\n", </s> remove     "* [Constraints and Assumptions](#Constraints-and-Assumptions)\n",
 </s> add     "* [Constraints](#Constraints)\n", </s> remove     "* [Constraints and Assumptions](#Constraints-and-Assumptions)\n",
 </s> add     "* [Constraints](#Constraints)\n", </s> remove     "* [Constraints and Assumptions](#Constraints-and-Assumptions)\n",
 </s> add     "* [Constraints](#Constraints)\n", </s> remove     "* [Constraints and Assumptions](#Constraints-and-Assumptions)\n",
 </s> add     "* [Constraints](#Constraints)\n",
    "* [Constraints](#Constraints)\n",
     "metadata": {},
     "source": [
      "## Problem: Implement quick sort.\n",
      "\n",
    "* [Constraints](#Constraints)\n",
      "* [Test Cases](#Test-Cases)\n",
      "* [Algorithm](#Algorithm)\n",
      "* [Code](#Code)\n",
      "* [Unit Test](#Unit-Test)\n",
      "* [Pythonic-Code](#Pythonic-Code)"
keep keep keep keep replace keep keep keep keep keep
 Fixed Constraints section label and link anchor. 
sorting_searching/quick_sort/quick_sort.ipynb