[PATCH] id,groups: optionally delimit output with null or newline

[Ondrej Oprala]

Hi,
I'd like to propose a patch based on 
http://lists.gnu.org/archive/html/bug-coreutils/2011-11/msg00024.html .
The -{0,1} option is only enabled for some option combinations (as 
discussed in above link)
although I have some doubts about the usefulness of groups -0|-1 without 
any other arguments;
on the other hand, changing the delims for the "USERNAME_1: 
group_1...group_n" output is IMHO very weird.
However, maybe we could only print the "USERNAME: " part if more than 
one username is specified as an argument.
Or does "id USERNAME -Gn" suffice in this case? What do you think?

Thanks,
Ondrej.

id-groups-delims.patch
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