message: [TF 2.0 API Docs] tf.image.adjust_contrast
  Added a usage example in image.adjust_contrast in image_ops_impl.py
  Issue is given in the link
diff: @@ -1632,6 +1632,13 @@ def adjust_contrast(images, contrast_factor):
  Returns:
  The contrast-adjusted image or images.
  +
  + Usage Example:
  + ```python
  + >> import tensorflow as tf
  + >> x = tf.random.normal(shape=(256, 256, 3))
  + >> tf.image.adjust_contrast(x,2)
  + ```
  """
  with ops.name_scope(None, 'adjust_contrast',
  [images, contrast_factor]) as name:
  