I've been doing some editing on Super User, and I got a hunch that a good way to find questions in need of improvement would be to search for titles containing backticks. So I punched title:` into the search box, and got this.
None of the titles on the first or second pages of those results actually contains a backtick. However, the search produces only 1917 results. If it had somehow matched all questions, "5000+" would be displayed.
What did my attempt to find backticks actually search for? (I know this isn't directly a useful question, but hopefully the answer will help people be better searchers in the future.) I wouldn't mind finding out how to actually search for a backtick, either, if someone knows a way.