bug#35287: dired-do-copy English beef-up

[積丹尼 Dan Jacobson]

In my brain
>> "Copy: 2 of 3 files skipped"
>> "Copy failed for 2 of 3 files"
are good enough as is, but
>> > Copy: 11 files
makes us think maybe it meant
>> > Copy: 11 files failed
but the last part failed to appear too. That in fact is probably what is
making me nervous.
(That's why we also add a period at the end of sentences, except if we
are a cellphone chat kiddie.)
So it should say something like
>> > Copied: 11 files. # or
>> > Copy: 11 files, succeeded.
>> > Copy: 11 files, succees. # etc.