Github user pwendell commented on the pull request:
https://github.com/apache/spark/pull/1699#issuecomment-50809825
Hey @liancheng why not just do an alternative fix where we just avoid
shadowing user options, but we don't change the documented format. The main
issue as I see it is that we aren't currently implementing the specification we
give in the docs. I don't think that implies we need to change the format.
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