bug#58843: Print "decrypted" rot13 text is buffer is read-only

[Eli Zaretskii]

> From: Philip Kaludercic <philipk@posteo.net>
> Cc: 58843@debbugs.gnu.org
> Date: Fri, 28 Oct 2022 19:37:28 +0000
> 
> >> When someone sends you rot13'ed text but the buffer is read-only, it
> >> seems the next best thing one can do is to print the decrypted text.  I
> >> don't think it makes sense in general for `translate-region' to do the
> >> same, so I just modified the code in rot13.el.
> >
> > Thanks, but I see no patch in your message.  I see a complete rot13.el
> > file.
> 
> Oops, I must have selected the wrong file.

Showing the result in the echo-area is a good idea, but echo-area is
not really suitable for displaying arbitrarily long text.  How about
popping a window with a temporary buffer instead?

This also needs a NEWS entry, I think.