adding device default to cpu since some commands involve a set device

Author: mgs28

intermediate_source/char_rnn_classification_tutorial.py

@@ -66,6 +66,7 @@
 # limit the RNN input layers. This is accomplished by converting Unicode strings to ASCII and allowing only a small set of allowed characters. 
 
 import torch 
+device = torch.device('cpu')
 import string 
 import unicodedata