minor typo add double-quote

Author: Rise Riyo

part-4.ipynb

@@ -1,7 +1,7 @@
 {
  "metadata": {
   "name": "",
-  "signature": "sha256:4472f9a0913d336511c37c245ad87a8dedf00fa956f17068863f1ade09aee044"
+  "signature": "sha256:4a278ac6425c5bd7fe81e9821feebba045da587794e4ac98d8f4148214e20f25"
  },
  "nbformat": 3,
  "nbformat_minor": 0,
@@ -141,11 +141,21 @@
      "cell_type": "code",
      "collapsed": false,
      "input": [
-      "names = [Danny\", \"Audrey\", \"Rise\", \"Alain\"]"
+      "names = [\"Danny\", \"Audrey\", \"Rise\", \"Alain\"]"
      ],
      "language": "python",
      "metadata": {},
-     "outputs": []
+     "outputs": [
+      {
+       "ename": "SyntaxError",
+       "evalue": "invalid syntax (<ipython-input-8-d07663d174bb>, line 1)",
+       "output_type": "pyerr",
+       "traceback": [
+        "\u001b[0;36m  File \u001b[0;32m\"<ipython-input-8-d07663d174bb>\"\u001b[0;36m, line \u001b[0;32m1\u001b[0m\n\u001b[0;31m    names = [Danny\", \"Audrey\", \"Rise\", \"Alain\"]\u001b[0m\n\u001b[0m                     ^\u001b[0m\n\u001b[0;31mSyntaxError\u001b[0m\u001b[0;31m:\u001b[0m invalid syntax\n"
+       ]
+      }
+     ],
+     "prompt_number": 8
     },
     {
      "cell_type": "markdown",