bug#28691: [PATCH] Add file name handler support for 'make-process' (Bug#28691)

[Eli Zaretskii <eliz@gnu.org>]

> From: Michael Albinus <michael.albinus@gmx.de>
> Cc: Eli Zaretskii <eliz@gnu.org>,  Philipp Stephani <phst@google.com>,  28691@debbugs.gnu.org
> Date: Sun, 23 Dec 2018 11:26:54 +0100
> 
> >> Tramp does *handle* all operations. But it does not *support* all of
> >> them. In case it is not possible to offer an implementation for
> >> `start-file-process' (as example), Tramp uses `ignore' as implementation.
> >
> > Yes, I've seen this, but it's a characteristic of Tramp, not of Emacs
> > itself, so I don't think it should be documented in the Elisp manual
> > itself.
> 
> Tramp (and partly ange-ftp) are the only file name handlers which offer
> process-related implementations. So it isn't wrong to document this, I
> believe.
> 
> Since we disgree here, let Eli decide.

Can we say that a file handler _might_ decide not to support a certain
operation, and describe what will happen in that case, without
mentioning Tramp?