Github user srowen commented on a diff in the pull request:
https://github.com/apache/spark/pull/7912#discussion_r36207916
--- Diff: docs/README.md ---
@@ -8,6 +8,16 @@ Read on to learn more about viewing documentation in plain
text (i.e., markdown)
documentation yourself. Why build it yourself? So that you have the docs
that corresponds to
whichever version of Spark you currently have checked out of revision
control.
+## Prerequisites
+The Spark documenation build uses a number of tools to build HTML docs and
API docs in Scala, Python
+and R. To get started you can run the following commands
+
+ $ sudo gem install jekyll
--- End diff --
OK no problem. It's hardly a big deal; was more worrying about later
updating one bit but not the other but, it's an ancillary doc that's not
frequently updated.
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