message: improve tf.divide() docstring
  Added a usage example and description of the function parameters and return values
diff: @@ -317,7 +317,23 @@ class DivideDelegateWithName(object):
  @tf_export("math.divide", "divide")
  @dispatch.add_dispatch_support
  def divide(x, y, name=None):
  - """Computes Python style division of `x` by `y`."""
  + """Computes Python style division of `x` by `y`.
  +
  + For example:
  + ```python
  + import tensorflow as tf
  + x = tf.constant([16, 12, 11])
  + y = tf.constant([4, 6, 2])
  + tf.divide(x,y) # [4. , 2. , 5.5]
  + ```
  + Args:
  + x: A `Tensor`
  + y: A `Tensor`
  + name: A name for the operation (optional).
  +
  + Returns:
  + A `Tensor` with same shape as input
  + """
  if name is not None:
  # Cannot use tensors operator overload, because it has no way to track
  