Github user minahlee commented on the issue:
https://github.com/apache/zeppelin/pull/1879
@cloverhearts Can you also look into
https://github.com/apache/zeppelin/blob/master/zeppelin-web/src/app/notebook/paragraph/paragraph.controller.js#L764
this line?
I see another error related to editor.

How to reproduce
1. go to `Basic Features (Spark)` tutorial notebook
2. run first markdown paragraph
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