ls: sort options in --help described twice

[php-coder]

    Hi all!

    In output `ls --help`:

    address@hidden ~]$ LANG=C ls --help
    ...
    -S                         sort by file size
        --sort=WORD            extension -X, none -U, size -S, time -t,
                               version -v, status -c, time -t, atime -u,
                               access -u, use -u
    ...

    Varians time -t described twice. It's in po/*.po too.

    https://bugzilla.altlinux.org/show_bug.cgi?id=8176

    Reported by Vitaly A. Ostanin <vyt at altlinux dot org>


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