Re: possible bug in quoted-printable-decode region

[Eli Zaretskii <eliz@gnu.org>]

> From: Uwe Brauer <oub@mat.ucm.es>
> Date: Thu, 28 Jun 2018 14:33:56 +0200
> 
>    > quoted-printable-decode-region gives you a byte string. You are then
>    > supposed to decode that into text using whichever character encoding
>    > you know is used. (Quoted-printable encoding, unlike URL
>    > percent-encoding, does not mandate UTF-8. In RFC 2822 mail, the
>    > character encoding will be given in the Content-Type header’s charset=
>    > parameter. =C3=AD looks like a quoted-printable encoding of UTF-8
>    > encoding of the character U+00ED LATIN SMALL LETTER I WITH ACUTE.)
> 
>    > As a shortcut, you could pass the character encoding as the last
>    > argument to q-p-d-r, but that is described as deprecated in the
>    > docstring.
> 
> 
> Thanks, but now I am confused. I have that file, with 
>  Buenas d=C3=ADas:
> 
> How can I translate/decode that to latin1 or utf8? Or are you saying
> that this is not possible. 

It's possible: you should follow quoted-printable-decode-region with
decode-coding-region, and pass it a suitable coding-system.

> Still don't know what to do if the file had no mail header.

You will have to guess the encoding somehow.  Emacs cannot (and
shouldn't in this case).