Update generated Op docs.

Change: 110379526

tensorflow/g3doc/api_docs/python/train.md

@@ -286,7 +286,7 @@ Construct a new gradient descent optimizer.
 
 *  <b>`learning_rate`</b>: A Tensor or a floating point value.  The learning
     rate to use.
-*  <b>`use_locking`</b>: If True use locks for update operation.s
+*  <b>`use_locking`</b>: If True use locks for update operations.
 *  <b>`name`</b>: Optional name prefix for the operations created when applying
     gradients. Defaults to "GradientDescent".