This issue was reported by one of our community members:
When using Syntax Highlighting markup in a discussion, if you use the word "empty", it appears as "emptyempty." I checked all of the syntax options and it only seems to occur for PHP.
I just tried this while writing this post, and it did not occur, but it did using the Public Preview (preview-jivex.jiveon.com).
I'm using Cloud, still on 2016.1, not using Content Evolution.
An example of this can be seen at How do I identify the email that created the case? and:
I was able to replicate this behavior locally as well and have filed this behavior with our engineering team as JIVE-73831. If you would like to track and receive updates on this issue, please submit a case in your customer group here in the Jive Community and the next available support member can link your instance to the bug for tracking.