Fix headlines so they are questions
This data explorer query shows questions without question marks at the end of their title.
It would be great to try to fix a lot of them at once. Another thing to look out for here might be questions with "this" in them (this query might help).
We started with north of 1400 questions that didn't end in question marks as measured by the query above (almost 25% of all questions). I'll log our progress in driving that number down here. I think the cache that drives explorer query results is cleared weekly.
12/27/2015: We're down around 1340.
2/15/2016: 994 -- We're below a thousand!