Script Summary: Automatically closes any unclosed markup tags on submission.
Only looks at those allowed by OKCupid (bold, italics).
Also, it doesn't magically know where you *meant* to close - it just adds enough closing tags to match the number of opening tags you entered. This means that it can't fix your post if you broke it, but subsequent comments will not be harmed by your typo or omission.
TODO: 1) add something to look for common mispelins of the closing tags; 2) deal with the tags as an array instead of hard-coding them.