Alexandre Raymond <cerb...@gmail.com> writes:

> As per ISO/IEC 9899, Section 7.1.3 on reserved identifiers,
> identifiers starting with an underscore are reserved.
>
> Therefore:
> 1) Rename all incorrect header guards
>
> While I'm at it:
> 2) Standardize header guards to "#ifndef SOMETHING_H"

Consistency is good.

> 3) Repeat the header guard identifier after the closing "#endif"

Such comments can help readers to navigate #if mazes.  Not the case for
header guards.  Just noise.

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