Github user pwendell commented on the pull request:
https://github.com/apache/spark/pull/1666#issuecomment-50804105
Do you know what the oldest version of Jekyll is that supports this option?
We should definitely upgrade this, but I also want to make sure we don't break
the build for people using older jekyll versions.
For a sample size of 1, here is the version I'm running:
```
$ jekyll -v
jekyll 1.1.2
```
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