[git commit master] convert // comments to /**/; remove empty #if/#endif pairs. no code changes

[Bernd Schmidt]

Denys Vlasenko wrote:

> +/* I think it's wrong: _toupper(c) assumes that c is a *lowercase* *letter* -
> + * it is defined as ((c) ^ 0x20)!
> + * if ((__uwchar_t) wc <= 0x7f) {
> + * return (desc == _CTYPE_tolower) ? _tolower(wc) : _toupper(wc);
> + * }
> + */

This is awful.  Please use #if 0 blocks, they allow us to leave the
comment structure intact as well as letting most editors do the right
thing wrt. autoindentation.


Bernd
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