Comment by rootlocus

    Now, some people will claim that having 8-character indentations makes
    the code move too far to the right, and makes it hard to read on a
    80-character terminal screen.  The answer to that is that if you need
    more than 3 levels of indentation, you're screwed anyway, and should fix
    your program.

https://www.kernel.org/doc/Documentation/process/coding-styl...