message: Fixed rendering errors in tf.GradientTape docs
diff: @@ -863,6 +863,7 @@ class GradientTape(object):
  Equivalent to exiting and reentering the tape context manager with a new
  tape. For example, the two following code blocks are equivalent:
  +
  ```
  with tf.GradientTape() as t:
  loss = loss_fn()
  @@ -1107,6 +1108,7 @@ class GradientTape(object):
  result in the jacobian computation given the independence assumption.
  Example usage:
  +
  ```python
  with tf.GradientTape() as g:
  x = tf.constant([[1, 2], [3, 4]], dtype=tf.float32)
  