[Toybox] test.c patches on GitHub

[Kevin Spiteri]

>
> POSIX specifies that it *should* be inconsistent, i.e. the cases with 0,
> 1, 2, 3, and 4 args are different than the cases with 5 or more args.  As
> always, this appears to be a historical compromise to reconcile the
> behavior of different shells in common cases.
>
> http://pubs.opengroup.org/onlinepubs/9699919799/utilities/test.html
> (scroll down)
>
Thanks, that explains it!

I edited a version I was using to address some issues mentioned in this
thread.
https://github.com/spiterikevin/toybox/blob/compoundtest/toys/pending/test.c

There are still some differences from coreutils. E.g., in coreutils,
[ \( \( \) \) \) ] is true because the inner \) is treated as a plain
string.
[ \( \( \( \) \) ] is a syntax error.
Removing one set of outer parentheses gets into the explicit 3-argument
special cases and both become true.
How important is it to match these details to coreutils? In my
implementation the 3-argument cases match, but both 5-argument cases are
syntax errors.

Kevin
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