xpcfix -c `find | grep -P "cpp$|h$" | perl -pe 's/\n/ /'`
This isn't a huge deal, but it's necessary for the other style changes we want to make. Specifically, when adding and removing things from lines within macros, xpcfix corrects continuation backslashes by putting them at column 79. If we make sure that this is also the default everywhere, then everything will match up.
git diff -w shows no changes here as well.