message: Fix a typo in TPUConfig documentation.
diff: @@ -82,7 +82,7 @@ class TPUConfig(
  `True` or `PER_HOST_V1` mode. In `PER_HOST_V2` mode, it is
  `train_batch_size` // #cores. In `BROADCAST` mode, `input_fn` is only
  invoked once on host 0 and the tensors are broadcasted to all other
  - replicas. The batch size equals to train_batch_size`. With the per-core
  + replicas. The batch size equals to `train_batch_size`. With the per-core
  input pipeline configuration, the shard batch size is also
  `train_batch_size` // #cores.
  Note: per_host_input_for_training==PER_SHARD_V1 only supports mode.TRAIN.
  