Relevant commit, specially, see the changes to ArticleInfoController: https://github.com/x-tools/xtools-rebirth/commit/2d8d7f2a54b14bac9fdc6ddca949e04b91ddb061

This probably isn't a 5, but certainly a 3. I wanted to move more stuff out of ArticleInfo into some repository and write some tests, but we literally have to comb through the article revision by revision. It's hard to devise a way to break out parseHistory() into multiple, testable functions. So I've instead just improved the comments, and made it use more of things Edit offers.

Anyway, this seems to do the trick. [[George H. Bush]] loads successfully: http://xtools.wmflabs.org/articleinfo/en.wikipedia.org/George%20W.%20Bush

I also fixed several other unnoticed bugs and a few regressions. I'm going to continue to try to clean it up even more, and hopefully get better test coverage.