message: Simple comment fix in CheckpointInputPipelineHook.
diff: @@ -198,7 +198,7 @@ class CheckpointInputPipelineHook(session_run_hook.SessionRunHook):
  # is run *after* this hook. That is troublesome because
  # 1. If a checkpoint exists and this hook restores it, the initializer hook
  # will override it.
  - # 2. If no checkpoint exists, this hook will try to save an initialized
  + # 2. If no checkpoint exists, this hook will try to save an uninitialized
  # iterator which will result in an exception.
  #
  # As a temporary fix we enter the following implicit contract between this
  