bug#35367: 26.2; `dired-copy-how-to-fn' and HOW-TO arg of `dired-create-files'

[Lars Ingebrigtsen]

Mike Kupfer <mkupfer@alum.berkeley.edu> writes:

> The bit about
>
>    If it return value is a list, TARGET is a generalized
>     directory (e.g. some sort of archive).  The first element of
>     this list must be a function with at least four arguments:
>
> looks like it might be useful when the target is, for example, a tar
> file.  By default, copying a single file would replace the tar file.
> But this could be overridden (I think) to add or replace entries in the
> tar file.

I've now added something like this to the doc string in Emacs 29, and
that should hopefully clarify the use case slightly.

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