MediaWiki is a mature, living breathing beast. When making lots and lots of little tweaks, please try to make sure they actually work correctly prior to committing.
I'm becoming convinced that a huge benefit of the git migration will be in moving to pre-commit review. If it doesn't work, don't let it into to core yet... The very idea what we can have a big "review backlog" on things ALREADY COMMITTED is a large part of why we have so many regressions when we finally catch up and update.
That is all; please go on about your business, citizens.
</rant>
-- brion vibber (bvibber @ wikimedia.org)