      "Result:\n",
      "* `source` and `destination` nodes within `graph` are connected with specified `weight`.\n",
      "\n",
      "Note: \n",
      "* We'll be using an OrderedDict to make the outputs more consistent and simplify our testing.\n",
      "* Graph will be used as a building block for more complex graph challenges."
     ]
    },
    {
     "cell_type": "markdown",
     "metadata": {},
 
</s> remove     "* We'll be using an OrderedDict to make the outputs more consistent and simplify our testing.\n",
    "* Graph will be used as a building block for more complex graph challenges."
 </s> add     "* The Graph class will be used as a building block for more complex graph challenges." </s> remove     "    * Yes\n",
 </s> add     "    * Implement both\n",
    "* The Graph class will be used as a building block for more complex graph challenges."
      "Result:\n",
      "* `source` and `destination` nodes within `graph` are connected with specified `weight`.\n",
      "\n",
      "Note: \n",
    "* The Graph class will be used as a building block for more complex graph challenges."
    "* The Graph class will be used as a building block for more complex graph challenges."
     ]
    },
    {
     "cell_type": "markdown",
     "metadata": {},
keep keep keep keep replace replace keep keep keep keep keep
 Rework graph challenge and solution (#86) 
graphs_trees/graph/graph_challenge.ipynb