message: Fixes GitHub
  Adds usage example
diff: @@ -1519,8 +1519,23 @@ def assert_type_v2(tensor, tf_type, message=None, name=None):
  This can always be checked statically, so this method returns nothing.
  + Example:
  +
  + >>> a = tf.Variable(1.0)
  + >>> tf.debugging.assert_type(a, tf_type= tf.float32)
  +
  + >>> b = tf.constant(21)
  + >>> tf.debugging.assert_type(b, tf_type=tf.bool)
  + Traceback (most recent call last):
  + ...
  + TypeError: ...
  +
  + >>> c = tf.SparseTensor(indices=[[0, 0], [1, 2]], values=[1, 2],
  + ... dense_shape=[3, 4])
  + >>> tf.debugging.assert_type(c, tf_type= tf.int32)
  +
  Args:
  - tensor: A `Tensor` or `SparseTensor`.
  + tensor: A `Tensor`, `SparseTensor` or `tf.Variable .
  tf_type: A tensorflow type (`dtypes.float32`, `tf.int64`, `dtypes.bool`,
  etc).
  message: A string to prefix to the default message.
  