Re: make pred customable in auto-save-visited-mode

[Eli Zaretskii <eliz@gnu.org>]

> From: Philipp Stephani <p.stephani2@gmail.com>
> Date: Sun, 01 Apr 2018 17:19:38 +0000
> Cc: jixiuf@qq.com, emacs-devel@gnu.org
> 
>  > Probably the second option is better because the first option would prevent PRED from running for
>  > non-file-visiting buffers. Patch attached.
> 
>  AFAIU, this will unconditionally disable auto-saving in *ediff-merge*
>  and all the similar buffers, when auto-save-visited-mode is turned
>  on.  Is that what we want?  And if that's going to be the default, how
>  are users supposed to override it if they want?
> 
> I think not prompting is the right approach. It's not very user-friendly to interrupt the user every couple of
> seconds, and no other application I know that has autosave prompts the user for filenames. I think we should
> change the behavior by applying the patch; if some users do want to be interrupted, we can still add a
> customization option later. 

AFAIU, you are not disabling the prompt, you are disabling the
auto-saving itself for such buffers.  I'm asking if that is what we
want -- disable auto-saving for buffers like *ediff-merge* when
auto-save-visited-mode is turned on.