hotfix rocket example

Author: DerThorsten

content/pyolite/pyb2d/games/rocket.ipynb

@@ -212,7 +212,7 @@
     "\n",
     "    def post_debug_draw(self):\n",
     "        for planet, planet_def in self.planets.items():\n",
-    "\n",
+    "            pos = planet.position\n",
     "            self.debug_draw.draw_solid_circle(\n",
     "                pos, planet_def[\"radius\"] + 0.1, axis=None, color=planet_def[\"color\"]\n",
     "            )\n",
@@ -248,6 +248,14 @@
     "s.scale = 3\n",
     "tb = b2d.testbed.run(Rocket, backend=JupyterAsyncGui, gui_settings=s);"
    ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "674c57c8-b5b1-45a9-b75e-5ddc487f7d9b",
+   "metadata": {},
+   "outputs": [],
+   "source": []
   }
  ],
  "metadata": {