typo (pytorch#172)

Author: ssnl

beginner_source/nlp/deep_learning_tutorial.py

@@ -172,7 +172,7 @@
 # attempting to do something more than just this vanilla gradient update.
 # Many attempt to vary the learning rate based on what is happening at
 # train time. You don't need to worry about what specifically these
-# algorithms are doing unless you are really interested. Torch provies
+# algorithms are doing unless you are really interested. Torch provides
 # many in the torch.optim package, and they are all completely
 # transparent. Using the simplest gradient update is the same as the more
 # complicated algorithms. Trying different update algorithms and different