copy and array length vs capacity. (Doc suggestion?)

[Jon D via Digitalmars-d-learn]

On Sunday, 22 November 2015 at 00:10:07 UTC, Ali Çehreli wrote:
> May I suggest that you improve that page. ;) If you don't 
> already have a clone o the repo, you can do it easily by 
> clicking the "Improve this page" button on that page.
>
Hi Ali, thanks for the quick response. And point taken :)  I 
hadn't noticed those buttons on the doc pages, looks very 
convenient. There are a couple formalities I need to look into 
before making contributions, even small ones, but I'll check into 
these.
>
> Regarding why copy() cannot use the capacity of the slice, it 
> is because slices don't know about each other, so, copy could 
> not let other slices know that the capacity has just been used 
> by this particular slice.
>
Thanks for the explanation, very helpful understanding what's 
going on.

--Jon