message: updated interleave doc example
diff: @@ -1084,24 +1084,20 @@ class DatasetV2(object):
  For example:
  ```python
  - # NOTE: The following examples use `{ ... }` to represent the
  - # contents of a dataset.
  - a = { 1, 2, 3, 4, 5 }
  + a = Dataset.range(1, 6) # [ 1, 2, 3, 4, 5 ]
  # NOTE: New lines indicate "block" boundaries.
  a.interleave(lambda x: Dataset.from_tensors(x).repeat(6),
  - cycle_length=2, block_length=4) == {
  - 1, 1, 1, 1,
  - 2, 2, 2, 2,
  - 1, 1,
  - 2, 2,
  - 3, 3, 3, 3,
  - 4, 4, 4, 4,
  - 3, 3,
  - 4, 4,
  - 5, 5, 5, 5,
  - 5, 5,
  - }
  + cycle_length=2, block_length=4) # ==> [1, 1, 1, 1,
  + # 2, 2, 2, 2,
  + # 1, 1,
  + # 2, 2,
  + # 3, 3, 3, 3,
  + # 4, 4, 4, 4,
  + # 3, 3,
  + # 4, 4,
  + # 5, 5, 5, 5,
  + # 5, 5]
  ```
  NOTE: The order of elements yielded by this transformation is
  