Github user srowen commented on the pull request:
https://github.com/apache/spark/pull/11180#issuecomment-183645806
Aha, one significant update. Yes, the change here is a good one, as I also
had to install this gem to build the docs. In fact we can simplify:
```
sudo gem install jekyll jekyll-redirect-from pygments.rb
sudo pip install Pygments sphinx
```
Maybe it's also worth noting that you'd have to have Ruby and pip installed
(and I assume gcc, Python already), which may not be obvious. For Ubuntu that's:
```
sudo apt-get install ruby ruby-dev pip-python
```
I don't feel strongly about adding that, but hey.
Actually I was incorrect in connecting this to SPARK-13300 though, as the
page in question is not generated from source in `docs/`. It's part of the ASF
site. This also uses pygments though. So maybe it turns out to be the same
problem.
While we can just add this change (with a possible simplification) I'm also
looking at whether I can fix up the ASF site with something similar.
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