fix code blocks

tutorials/create-first-ml-experiment/tutorial-1st-experiment-sdk-train.ipynb

@@ -29,12 +29,10 @@
         "\n",
         "In this tutorial, you learn the following tasks:\n",
         "\n",
-        "\n",
         "> * Connect your workspace and create an experiment \n",
         "> * Load data and train a scikit-learn model\n",
         "> * View training results in the studio\n",
-        "> * Retrieve the best model",
-        "\n"
+        "> * Retrieve the best model"
       ]
     },
     {
@@ -60,9 +58,11 @@
         "Import the `Workspace` class, and load your subscription information from the file `config.json` using the function `from_config().` This looks for the JSON file in the current directory by default, but you can also specify a path parameter to point to the file using `from_config(path=\"your/file/path\")`. If you are running this notebook in a cloud notebook server in your workspace, the file is automatically in the root directory.\n",
         "\n",
         "If the following code asks for additional authentication, simply paste the link in a browser and enter the authentication token. In addition, if you have more than one tenant linked to your user, you will need to add the following lines:\n",
+        "```\n",
         "from azureml.core.authentication import InteractiveLoginAuthentication\n",
         "interactive_auth = InteractiveLoginAuthentication(tenant_id=\"your-tenant-id\")\n",
-        "Additional details on authentication can be found here: https://aka.ms/aml-notebook-auth \n"
+        "Additional details on authentication can be found here: https://aka.ms/aml-notebook-auth \n",
+        "```\n"
        ]
     },
     {