Merge pull request lukas#38 from mcharleb/master

Fix minor code issues

Author: lukas

amazon-reviews/download-amazon.sh

@@ -1,2 +1,2 @@
 wget http://snap.stanford.edu/data/amazon/productGraph/categoryFiles/reviews_Video_Games_5.json.gz 
-gunzip xvfz reviews_Video_Games_5.json.gz
+gunzip reviews_Video_Games_5.json.gz

scikit/classifier-svm.py

@@ -38,5 +38,5 @@
 # See what the classifier predicts for some new tweets:
 #for tweet in ('I love my iphone!!!', 'iphone costs too much!!!', 'the iphone is not good', 'I like turtles'):
 #  print('Tweet: ' + tweet)
-#  print('Prediction: ' + str(nb.predict(count_vect.transform([tweet]))))
+#  print('Prediction: ' + str(clf.predict(count_vect.transform([tweet]))))
 #  print('\n')