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

[Juri Linkov]

>> > Copy: 11 files
>> > Actually "Copied 11 files" is proper English and doesn't leave us
>> > somewhat worrying...
>>
>> Other messages that use the same operation name:
>>
>>   "Copy: 2 of 3 files skipped"
>>   "Copy failed for 2 of 3 files"
>>
>> Shouldn't the latter be "Copying failed"?
>> So for every operation three verb forms are needed:
>> "Copy", "Copying", "Copied", correct?
>
> My own advice is to leave it alone.

This is important in light of our efforts for i18n.

> If you want, for "Copy" read "Copy operation" or
> "Operation Copy".

"Operation Copy" is a catchy name.