> I'm sold on the idea that if you're committing your drafts to version control, then you should break your lines at syntactic points: at the end of a short sentence, or at the ends of the component phrases of a longer sentence. This should typically lead to a cleaner and more readily comprehensible version history.

What you're describing is called "track changes" in word processors.

I'd say an alternative to using Git or JJ or whatever is use a version control that exists to serve non-code. That is to say, use Track Changes! :D

Word, Google Docs, Scrivener (this is my favorite), etc. have no problem telling you "hey you changed this draft by inserting a paragraph and changing this other word's verb ending, while also replacing this one with a synonym."

Yeah, if you use Git, which was designed for tracking changes to a far more limited kind of language, you're going to run into incompatibilities. So track changes with a version control created for tracking changes to human language.

If you have to "rethink" your app in order to serve a new purpose, it's a red flag that you're trying to square a circle.

Better to use a tool that was created for your purpose.