That was me spamming keys. Definitely not even close to being in urgent need of fixing.
i think it wasn't when you type very quickly, but when you type a very long word (no space in it) in the comment if the width of the comment box is not wide enough before you start typing...
It isn't from the quickly writing, but from without using space key. Good point, but if you change field size, text'll back to right form.
@bh, @loucheman and @nieznajomyh gave the solution. Thanks!
BTW look at this:
Yeah, yeah, this is a longstanding known bug that's never been important enough to fix.
Ok.
just in case you hadn't seen it.
No, I noticed you said that.