Whitespace changes by clang-format.

These files are the ones with the least number of changes when running
clang-format over them and only the less controversial changes are
included, with a preference for having stay the same where things are
likely to be more controversial.
So, unfortunately, clang format doesn't support doing that. That implies a few options:

1. Add that functionality to clang-format.
2. Manually revert each change like this after running clang-format on a file.
3. Accept that this isn't meant to be and move on with our lives, cause using clang-format as is is better than the alternatives.
4. Don't use clang-format at all and format everything manually. (Note, this approach hasn't been working well so far.)