message: Fixes typo in compatibility.
diff: @@ -119,13 +119,13 @@ class Variable(object):
  various `Optimizer` classes use this collection as the default list of
  variables to optimize.
  - @compatiblity(eager)
  + @compatibility(eager)
  `tf.Variable` is not compatible with eager execution. Use
  - `tfe.Variable` instead which is compatable with both eager execution
  + `tfe.Variable` instead which is compatible with both eager execution
  and graph construction. See [the TensorFlow Eager Execution
  guide](https://github.com/tensorflow/tensorflow/tree/master/tensorflow/contrib/eager/python/g3doc/guide.md#variables-and-optimizers)
  for details on how variables work in eager execution.
  - @end_compatiblity
  + @end_compatibility
  """
  def __init__(self,
  