message: update misleading doc
diff: @@ -131,7 +131,8 @@ class OptimizationOptions(options.OptionsBase):
  ty=bool,
  docstring=
  "Whether to hoist ops that will discard data (such as skip, take, shard) "
  - "out of map transformations. If None, defaults to False.")
  + "out of unary cardinality preserved transformations. "
  + "If None, defaults to False.")
  hoist_random_uniform = options.create_option(
  name="hoist_random_uniform",
  