Github user Leemoonsoo commented on the issue:
https://github.com/apache/zeppelin/pull/2488
Thanks @TwUxTLi51Nus for the contribution!
LGTM. merge to master if no further comment.
CI failure is okay while this PR updates doc only CI does not build and
verify doc. If you're planning to make other patches in the future, please take
a look
http://zeppelin.apache.org/contribution/contributions.html#continuous-integration
to setup CI.
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