You'd have to be fascist about everyone using the same pretty-printer settings, or every commit will appear to be a rewrite and features like "blame" will be us

You'd have to be fascist about everyone using the same pretty-printer settings, or every commit will appear to be a rewrite and features like "blame" will be useless. Better to only reformat lines you're changing anyway, if the whitespace is messy enough to bother (e.g., alternating tabs and spaces).