Github user bzz commented on the issue: https://github.com/apache/zeppelin/pull/919 To be able to change indention is very reasonable option, esp. as soon as you start working with Python. @astroshim It could be hard to implement per-interpreter as @Leemoonsoo suggests for now, so how about changing this implementat to per-notebook settings? I think it would be useful. My only concern is whether it actually changes the paragraph code, or not. I have checked, and Ace editor we use in soft-tab configuration (although I can not find `useSoftTabs ` anywhere), but the user-input `\t` gets replaced by 4 spaces now. Then, how does [changing this setting](https://ace.c9.io/api/edit_session.html#EditSession.setTabSize) affect the paragraph (that already has no `\t`)? Will it re-format whole paragraph by adding more whitespace chars (affects the diff)?
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