Fix typos in code examples.

Author: mkcor

ExamplesFromChapters/Chapter1/SMS_behaviour.py

@@ -7,7 +7,7 @@
 alpha = 1.0 / count_data.mean()  # recall count_data is
                                  # the variable that holds our txt counts
 
-lambda_1 = pm.Exponential("lambda_1",  alpha)
+lambda_1 = pm.Exponential("lambda_1", alpha)
 lambda_2 = pm.Exponential("lambda_2", alpha)
 
 tau = pm.DiscreteUniform("tau", lower=0, upper=n_count_data)

ExamplesFromChapters/Chapter3/ClusteringWithGaussians.py

@@ -13,8 +13,8 @@
 centers = pm.Normal("centers", [150, 150], [0.001, 0.001], size=2)
 
 """
-The below deterministic functions map a assingment, in this case 0 or 1,
-to a set of parameters, located in the (1,2) arrays `taus` and `centers.`
+The below deterministic functions map an assignment, in this case 0 or 1,
+to a set of parameters, located in the (1, 2) arrays `taus` and `centers.`
 """