[MC-123821] /particle outputs are messed up.

When /particle is run, the command output in chat prints not understandable text.
example: https://youtu.be/j8B9LjyJ2Vs?t=6m8s

note: never found this myself, just saw the video.

Linked issues

I have already saw this in the last snapshot, 17w50a.

So is there another ticket already?

Cannot confirm, I am seeing "Displaying particle [internal id]" which is not better either