Github user yu-iskw commented on the pull request: https://github.com/apache/spark/pull/9380#issuecomment-156181157 @JihongMA thanks for the update! Could you revert `Skewness.scala` and `Kurtosis.scala`. Since I don't think the change relates to the issue. I know this is a minor thing, but we shouldn't change them in this PR.
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