bug#64960: Documentation for copy-sequence

[Eli Zaretskii]

> Date: Sun, 30 Jul 2023 16:42:28 +0000
> From:  uzibalqa via "Bug reports for GNU Emacs,
>  the Swiss army knife of text editors" <bug-gnu-emacs@gnu.org>
> 
> Have been reading the documentation for "copy-sequence".  The description,
> specifically
> 
> "The elements of a list, vector or record are not copied; they are
> shared with the original."
> 
> is not very clear about what it does and what one gets.

As the doc string says: the elements are not copied.  You get a new
sequence whose elements are shared with the original one.