message: Update array_ops.py
  added example for tf.identity
diff: @@ -59,7 +59,18 @@ _BaseSlice = slice
  @tf_export("identity")
  @dispatch.add_dispatch_support
  def identity(input, name=None): # pylint: disable=redefined-builtin
  - r"""Return a tensor with the same shape and contents as input.
  + r"""Identity returns the value of the input tensor at the time of evaluation.
  +
  + For example:
  +
  + ```python
  + import tensorflow as tf
  + val0 = tf.ones((1,), dtype=tf.float32)
  + a = tf.atan2(val0, val0)
  + a_identity = tf.identity(a)
  + print(a.numpy()) #[0.7853982]
  + print(a_identity.numpy()) #[0.7853982]
  + ```
  Args:
  input: A `Tensor`.
  