400,000 GitHub repositories, 1 billion files, 14 terabytes of code: Spaces or Tabs?

https://medium.com/@hoffa/400-000-github-repositories-1-billion-files-14-terabytes-of-code-spaces-or-tabs-7cfe0b5dd7fd#.44jfxd9iz
Spaces of tabs in source code? Depends on the language. I'm an old C-guy, so it's tabs. #programming