message: Fix api doc formatting typo.
diff: @@ -1695,10 +1695,11 @@ class Strategy(StrategyBase):
  Given a `tf.distribute.DistributedValues` or `tf.Tensor`-like
  object `value`, this API gathers and concatenates `value` across replicas
  - along the `axis`-th dimension. The result is copied to the "current" device
  - - which would typically be the CPU of the worker on which the program is
  + along the `axis`-th dimension. The result is copied to the "current" device,
  + which would typically be the CPU of the worker on which the program is
  running. For `tf.distribute.TPUStrategy`, it is the first TPU host. For
  - multi-client `MultiWorkerMirroredStrategy`, this is CPU of each worker.
  + multi-client `tf.distribute.MultiWorkerMirroredStrategy`, this is the CPU of
  + each worker.
  This API can only be called in the cross-replica context. For a counterpart
  in the replica context, see `tf.distribute.ReplicaContext.all_gather`.
  @@ -3209,11 +3210,13 @@ class ReplicaContext(ReplicaContextBase):
  `value` as a nested structure consisting of two items to all-gather, `a` and
  `b`.
  - On Replica 0, `value` is {'a': [0], 'b': [[0, 1]]}
  - On Replica 1, `value` is {'a': [1], 'b': [[2, 3], [4, 5]]}
  + On Replica 0, `value` is `{'a': [0], 'b': [[0, 1]]}`.
  - Result for `all_gather` with `axis`=0: (on each of the replicas):
  - {'a': [1, 2], 'b': [[0, 1], [2, 3], [4, 5]]}
  + On Replica 1, `value` is `{'a': [1], 'b': [[2, 3], [4, 5]]}`.
  +
  + Result for `all_gather` with `axis`=0 (on each of the replicas) is:
  +
  + ```{'a': [1, 2], 'b': [[0, 1], [2, 3], [4, 5]]}```
  Args:
  value: a nested structure of `tf.Tensor` which `tf.nest.flatten` accepts,
  