message: Typo fix in distribute_lib.py
diff: @@ -2947,7 +2947,7 @@ class ReplicaContext(object):
  Returns:
  a `Tensor`.
  """
  - # It's important to prefer making the Tensor at call time whenver possible.
  + # It's important to prefer making the Tensor at call time whenever possible.
  # Keeping Tensors in global states doesn't work well with nested
  # tf.function, since it's possible that the tensor is generated in one func
  # graph, and gets captured by another, which will result in a subtle "An op
  