bug#24958: Please make "omitting directory" message clearer

[Paul Eggert]

On 11/16/2016 05:07 PM, Pádraig Brady wrote:
> we copy the directory but not the contents.
> I'll adjust to:
>
>    "not recursing; omitting directory '/foo/bar'"
How about using the traditional wording, e.g., Solaris?

$ cp /etc /tmp
cp: /etc: is a directory

That's pretty clear. AIX is more verbose and is even clearer:

$ cp /etc /tmp
cp: 0653-436  /etc is a directory.
        Specify -r or -R to copy.

I think either of these wordings would be better for new users than "not 
recursing".