Typo and tiny code change for clarity

Code change conforms to style used in later portions of the notebook.

ipynb/Economics.ipynb

@@ -48,7 +48,7 @@
     "N  = 5000 # Default size of the population\n",
     "MU = 100. # Default mean of the population\n",
     "\n",
-    "population = [random.gauss(mu=MU, sigma=MU/5) for actor in range(N)]"
+    "population = [random.gauss(mu=MU, sigma=MU/5) for _ in range(N)]"
    ]
   },
   {
@@ -182,7 +182,7 @@
    "outputs": [],
    "source": [
     "def random_split(A, B):\n",
-    "    \"Take all the money uin the pot and divide it randomly between the two actors.\"\n",
+    "    \"Take all the money in the pot and divide it randomly between the two actors.\"\n",
     "    pot = A + B\n",
     "    share = random.uniform(0, pot)\n",
     "    return share, pot - share"