I wish he'd have also counted the files that use only spaces or only tabs compared to a mixture of both in the indentation. My reason for being against tabs is

I wish he'd have also counted the files that use only spaces or only tabs compared to a mixture of both in the indentation. My reason for being against tabs is that unless you have something like gofmt, somebody will inevitably screw up and put in indentation that mixes tabs and spaces. The second thing to check would be tabs that aren't in the initial indentation whitespace of the line. The other inevitable screw-up is using tabs to do some kind of vertical layout that shows up right with exactly one tab stop size.