Patch from Dmitry Zakharov:

Charlie Brady wrote:
> Here's another awk parsing problem - unary post increment - pre is fine:
>
>bash-2.05a$ echo 2,3 | gawk -F , '{ $2++ }'
>bash-2.05a$ echo 2,3 | /tmp/busybox/busybox awk -F , '{ $2++ }'
>awk: cmd. line:1: Unexpected token
>
Here's a fix for this. There is another problem with constructions like 
"print (A+B) ++C", I don't
know whether somebody uses such constructions (fixing both these 
problems would require very
serious change in awk code).

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