message: Correct a typo in base_layer_utils.
diff: @@ -847,7 +847,7 @@ def no_ragged_support(inputs, layer_name):
  def is_split_variable(v):
  - """Returns True if `v` is either a PartionedVariable or a SharedVariable."""
  + """Returns True if `v` is either a PartionedVariable or a ShardedVariable."""
  return hasattr(v, '_variable_list') or hasattr(v, '_variables')
  