One more import fixed

Author: andreas-zeller

notebooks/Alhazen.ipynb

@@ -3419,7 +3419,15 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "import inspect\n",
+    "import inspect"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
     "print(inspect.getsource(task_sqrt))"
    ]
   },