[Bug 280566] tree(3) man page: Fix example source code.

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=280566

Maxim Konovalov <maxim@FreeBSD.org> changed:

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                 CC|                            |maxim@FreeBSD.org

--- Comment #1 from Maxim Konovalov <maxim@FreeBSD.org> ---
Hi,

Thanks for the patch!

Just for the record, it seems that there are several separate issues with the
example, specifically:

(1) RB_AUGMENT macro should be defined as early as possible.  Otherwise it is
no-op and the program doesn't work as intended, e.g., it doesn't calculate sum
of the tree elements.

(2) Man page formatting error that leads to a compilation error if you try to
copy-paste the code.

(3) There is also a missed new line between the tree structure content and the
sum of the elements but it looks minor.

I created a slightly better looking to me patch to address all of the above.

Dear Hodong, are you good with this one?

Thanks,

Maxim

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