... Either way, the left edge of the comment will not line up
with the "define" or "undef."
This is the perfect illustration of the problem of mixing the
incompatible C and pre-processor indentation. Visually, you eye is
drawn to want to align the C code with the pre-processor indentation.
But that is wrong
C indentation follows its own rules and should not be affected in any
way by the presence or absence of pre-processor stuff in the vicinity.
But it is grating to look at.
The simplest and most cosmetically acceptable fix from my point of view
would be eliminate all pre-processor indentation when it conflicts
visually with C indentation. The pre-processor indentation has value in
certain cases, but not so often when mixed with C code.
