bug#32903: [PATCH] Display uncompressed size when testing

[Sergey Ponomarev]

> Alongside the OK message, print the real size in bytes; this provides
a way to view the stored file's size when it's larger than 4GiB.

You can get a real size by `gzip --list` command. Why to show the size in
`gzip --test` output? Almost all other compressors (lzop, xz, bzip2, etc0
just shows the same message:
filename: OK

Even more, archive manages and other tools may try to parse the test
command output and the change may have some impact.

> this provides a way to view the stored file's size when it's larger than
4GiB.
I didn't get it. Can you please elaborate on this: `gzip --list` can't show
uncompressed size more than 4GiB?

Regards, Sergey