Github user soralee commented on the issue:
https://github.com/apache/zeppelin/pull/1686
@1ambda Thanks for sharing issue!!
I guess `CTRL+L` short key is being used by some ace editor users.
So, I removed `CTRL-ALT-L` key binding and I changed **Clear output** short
key from `CTRL + SHIFT + C` to `CTRL-ALT-L`
What do you think?
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