Completed tutorial on algebra

examples/product_spaces.ipynb

@@ -7,6 +7,7 @@
     "\n",
     "This tutorial is part of a bigger series on probabilistic machine learning and aids in understanding product $\\sigma$-algebras.\n",
     "At the end of this notebook, you will understand...\n",
+    "\n",
     "- The Definition of the $\\sigma$-Algebra\n",
     "- Why these concepts matter, especially for robotics\n",
     "- How to apply them using the package   \n",