    },
    "language_info": {
     "codemirror_mode": {
      "name": "ipython",
      "version": 2
     },
     "file_extension": ".py",
     "mimetype": "text/x-python",
     "name": "python",
     "nbconvert_exporter": "python",
 
</s> remove    "metadata": {
    "collapsed": false
   },
 </s> add    "metadata": {}, </s> remove    "metadata": {
    "collapsed": false
   },
 </s> add    "metadata": {}, </s> remove     "    pass "
 </s> add     "    pass" </s> remove     "    test.testReverseWords()\n",
 </s> add     "    test.testReverseWords(reverse_words)\n", </s> remove     "            assert_equal(reverse_words('the sun is hot'), 'eht nus si toh')\n",
    "            assert_equal(reverse_words(''), None)\n",
    "            assert_equal(reverse_words('123 456 789'), '321 654 987')\n",
    "            assert_equal(reverse_words('magic'), 'cigam')\n",
 </s> add     "            assert_equal(func('the sun is hot'), 'eht nus si toh')\n",
    "            assert_equal(func(''), None)\n",
    "            assert_equal(func('123 456 789'), '321 654 987')\n",
    "            assert_equal(func('magic'), 'cigam')\n",
    "version": 2.0
    },
    "language_info": {
     "codemirror_mode": {
      "name": "ipython",
    "version": 2.0
     },
     "file_extension": ".py",
     "mimetype": "text/x-python",
     "name": "python",
     "nbconvert_exporter": "python",
keep keep keep keep replace keep keep keep keep keep
 Updated Unit Test to include function call (reverse_words) in testReverseWords 
staging/arrays_strings/reverse_words/reverse_words_challenge.ipynb