bug#70587: More buffers that ought to be read-only

[Eli Zaretskii]

> Date: Sun, 28 Apr 2024 23:35:34 +0300
> Cc: 70587@debbugs.gnu.org, jidanni@jidanni.org
> From: Dmitry Gutov <dmitry@gutov.dev>
> 
> On 28/04/2024 08:13, Eli Zaretskii wrote:
> >> But if we install the above patch, then*vc-diff*  will suddenly not be
> >> read-only any more, so we should arguably change
> >> `diff-default-read-only` at the same time, which will in turn cause
> >> another behavior change when people open a `.diff` file.
> > Why should*vc-diff*  be read-only regardless of
> > diff-default-read-only?  And why visiting a .diff file is different in
> > this regard?
> 
> I also think that we should flip diff-default-read-only to true, and 
> drop the special casing in vc-diff. :-)

That doesn't answer my questions.

Flipping the default value would require much more than 2 or 3 people
asking for it.