bug#65902: 29.0.92; emacsclient-mail.desktop fails due to complicated escaping

[Eli Zaretskii <eliz@gnu.org>]

> Date: Tue, 12 Sep 2023 20:46:54 -0700
> From: Jim Porter <jporterbugs@gmail.com>
> 
> On 9/12/2023 7:30 PM, sbaugh@catern.com wrote:
> > tags 65902 + patch
> > quit
> > 
> > This patch avoids the complicated scripting needed for
> > emacsclient-mail.desktop by adding a new flag to emacsclient, --funcall,
> > which mirrors emacs --funcall and allows emacsclient-mail.desktop to be
> > basically the same as emacs-mail.desktop.
> 
> I think this is actually the same as the (very long) bug#57752, so 
> thanks for working on this. (It was on my list of things to get to, but 
> I just haven't had time.)
> 
> Over there, we agreed that something like your patch is wanted, albeit 
> with two caveats:
> 
> 1. Since "--funcall" for the regular "emacs" binary doesn't pass 
> arguments to the function, how about we call this option "--apply" instead?
> 
> 2. It would be great if we could get "--apply" for the regular "emacs" 
> binary too, so that both programs work the same way (at least in this 
> regard). Even better, if you could forward "--apply" from "emacsclient" 
> to the alternate editor (which would be "emacs" 99% of the time) 
> automatically. That works, in a roundabout way, for the Emacs daemon, 
> but not if the alternate editor is "emacs".

This is how that bug's discussion started.  Are we going to have it
all one more time?