Added explanation for tests

rdf/RDF.ipynb

@@ -280,7 +280,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 2,
    "metadata": {
     "deletable": false,
     "editable": false,
@@ -293,7 +293,17 @@
      "solution": false
     }
    },
-   "outputs": [],
+   "outputs": [
+    {
+     "data": {
+      "application/javascript": [
+       "IPython.CodeCell.options_default.highlight_modes['magic_turtle'] = {'reg':[/^%%ttl/]};"
+      ]
+     },
+     "metadata": {},
+     "output_type": "display_data"
+    }
+   ],
    "source": [
     "from helpers import *\n",
     "from rdflib import term, RDF, Namespace"
@@ -320,12 +330,30 @@
     "# YOUR ANSWER HERE\n",
     "```\n",
     "\n",
-    "Execute the following line. It simple fills 'example' with the code written below. It should produce the output 'File loaded!\"."
+    "Execute the following line without any modification. It simple fills 'example' with the code written below. It should produce the output 'File loaded!\"."
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {
+    "deletable": false,
+    "editable": false,
+    "nbgrader": {
+     "checksum": "f6eb0c6c19c1756d7705f52866b00f82",
+     "grade": false,
+     "grade_id": "cell-a4ed500079ba36ca",
+     "locked": true,
+     "schema_version": 1,
+     "solution": false
+    }
+   },
+   "source": [
+    "Now run the tests:"
    ]
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 3,
    "metadata": {
     "deletable": false,
     "nbgrader": {
@@ -337,7 +365,21 @@
      "solution": true
     }
    },
-   "outputs": [],
+   "outputs": [
+    {
+     "data": {
+      "text/markdown": [
+       "File loaded!"
+      ],
+      "text/plain": [
+       "<IPython.core.display.Markdown object>"
+      ]
+     },
+     "execution_count": 3,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
    "source": [
     "%%ttl example\n",
     "\n",
@@ -346,20 +388,9 @@
   },
   {
    "cell_type": "markdown",
-   "metadata": {
-    "deletable": false,
-    "editable": false,
-    "nbgrader": {
-     "checksum": "f6eb0c6c19c1756d7705f52866b00f82",
-     "grade": false,
-     "grade_id": "cell-a4ed500079ba36ca",
-     "locked": true,
-     "schema_version": 1,
-     "solution": false
-    }
-   },
+   "metadata": {},
    "source": [
-    "Now run the tests:"
+    "Now run the tests executing the following cell. You will see they fail (as expected)."
    ]
   },
   {