Fixed spelling mistake "verysimilar" in second text block after "Choosing An Appropriate Structure"

3_NestedDataStructures.ipynb

@@ -259,7 +259,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "Now that we have produced this dictionary, we can iterate over it, and each of the lists contained within, using a verysimilar nested `for` loop structure to the one we had before for our list of lists:"
+    "Now that we have produced this dictionary, we can iterate over it, and each of the lists contained within, using a very similar nested `for` loop structure to the one we had before for our list of lists:"
    ]
   },
   {