Bills are written in English but I'd view them as code. It's not interesting to track changes in code for outsiders. Sure, it's cool for programmers, but users of software do not care if you unrolled a for-loop and who did it. They don't even know what that is and the same holds for bills. We have journalists for that and nobody is willing to pay for that because nobody gives a shit about a functioning democracy. Now that's one hell of a problem git ain't going to solve.