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

[Philip Kaludercic]

Stefan Kangas <stefankangas@gmail.com> writes:

> Philip Kaludercic <philipk@posteo.net> writes:
>
>>> No, this is described in the "Rmail Rot13" node.
>>
>> Ah yes.  How does this look like:
>
> Do people use rot13 very much these days?  I've not seen it used in
> practice in 20 years, but that's just anecdotal of course.

The reason I am proposing this patch is because I have been using it for
the last few weeks as I am taking a cryptography course, and the
exercise hints are "encrypted" in rot13.

> Would it make sense to exclude the `(emacs) Rmail Rot13' section from
> the printed manual?  I don't know how frequently we do that, and maybe
> the practice is frowned upon.

I have no opinion on this.