Github user yinxusen commented on the pull request:
https://github.com/apache/spark/pull/11108#issuecomment-197634056
@mengxr If there is no empty line, we will get a bulk of results which are
hard to tell and recognize. I think it's a good experience for users that they
can use `./bin/run-example ml.xxxExample` to see some tidy outputs directly.
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