[Rpm-maint] [rpm-software-management/rpm] 'rpm -qlv' does not correctly handle long owner and group name (#544)

[Tomas Hoger]

I got an email notification about a comment that was made on this issue by @n3npq , but I can't see it here in the github webui.  Quoting his comment from the email notification:

> FWIW, rpm -qlv used exactly the same format as cpio(1) when implemented way back when.
>
> Continuing that practice of using the same format as cpio(1) preserves output compatibility.

I checked and tested cpio, and I can confirm it truncates names to 8 characters, but it always has space in between user and group name and hence does not merge them. The format string is `%-8.8s %-8.8s`:

http://git.savannah.gnu.org/cgit/cpio.git/tree/src/copyin.c?h=release_2_12#n779

I can't tell if that format has been used forever, but it's what's used in the initial import to the above upstream git form 2004.

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