message: Update documentation for Dataset.repeat to be more precise about the semantics of its count argument.
diff: @@ -991,7 +991,14 @@ class DatasetV2(tracking_base.Trackable, composite_tensor.CompositeTensor):
  return dataset
  def repeat(self, count=None):
  - """Repeats this dataset `count` times.
  + """Repeats this dataset so each original value is seen `count` times.
  +
  + For example, the following code will evaluate to [0, 1, 0, 1]:
  +
  + ```python
  + dataset = tf.data.Dataset.range(2)
  + [int(x.numpy()) for x in dataset.repeat(2)]
  + ```
  NOTE: If this dataset is a function of global state (e.g. a random number
  generator), then different repetitions may produce different elements.
  