Update 09 - Combinatorics.ipynb

Fix minor typos

Author: WillieMaddox

Part 2/Section 08 - Iteration Tools/09 - Combinatorics.ipynb

@@ -851,7 +851,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "The important thing to note is that elements are not 'repeated' in the permutation. But the uniqueness of an element is **not** based on its value, but rather on its **position** in the original iterable.\n",
+    "The important thing to note is that elements are not 'repeated' in the permutation. The uniqueness of an element is **not** based on its value, but rather on its **position** in the original iterable.\n",
     "\n",
     "Take this example:"
    ]
@@ -912,7 +912,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "As you can see, each tuple looks like it has been repeated twice - but considering the elements are unique based on their position, this actually quite correct."
+    "As you can see, each tuple looks like it has been repeated twice - but considering the elements are unique based on their position, this is actually quite correct."
    ]
   },
   {