Don't indicate typo when multiple lines have passed.

[znx]

So here is the example:

(@  NoTopic) only throwing it into the sun will dfestroy it
(@MonicaOff) I could hit it with a shovel
(@  NoTopic) Not good enough.
(@MonicaOff) This one time, I hit a guy into the ground with a shovel
(@  NoTopic) yes, yes.
(@  NoTopic) -f
(+      znx) where is the f nt?
(@  NoTopic) north pole

nt is indicating the typo in "dfestroy" but since its several lines back there seems little point. Maybe have the bot not indicate typos if another line of output passes through. How about emptying "output:typos" or similar .. hrmm.