     "mimetype": "text/x-python",
     "name": "python",
     "nbconvert_exporter": "python",
     "pygments_lexer": "ipython3",
     "version": "3.5.0"
    }
   },
   "nbformat": 4,
   "nbformat_minor": 0
  }
 
</s> remove     "        return self._insert(self.root, data)\n",
 </s> add     "        else:\n",
    "            return self._insert(self.root, data)\n", </s> remove         return self._insert(self.root, data)
 </s> add         else:
            return self._insert(self.root, data)
   "version": "3.4.3"
     "mimetype": "text/x-python",
     "name": "python",
     "nbconvert_exporter": "python",
     "pygments_lexer": "ipython3",
   "version": "3.4.3"
    }
   },
   "nbformat": 4,
   "nbformat_minor": 0
  }
keep keep keep keep replace keep keep keep keep keep
 Update bst challenge control flow (#146) 
graphs_trees/bst/bst_solution.ipynb