Re: "A diagram of C23 basic types"

On 09/04/2025 13:04, Janis Papanagnou wrote:

On 09.04.2025 13:00, Muttley@DastardlyHQ.org wrote:

On Wed, 9 Apr 2025 13:32:15 +0300
Michael S <already5chosen@yahoo.com> wibbled:

Message headers indicated that it is UTF-8 encoded as quoted printable.
I don't know (and don't want to know) too much about usenet mechanics,
but it seems to me that decent newsreader should decode it back into
UTF-8.

>
There's nothing in your header that says uft8:
>
MIME-Version: 1.0
Content-Type: text/plain; charset=US-ASCII
Content-Transfer-Encoding: 7bit

 Just for comparison, here's what I see in that header...
    MIME-Version: 1.0
   Content-Type: text/plain; charset=UTF-8
   Content-Transfer-Encoding: quoted-printable
 

Michael's Usenet client, like many as far as I can see, adapts the charset and Content-Transfer-Encoding according to the lowest that supports the characters used in the post.
Thus when he posts without any non-ASCII characters, it uses US-ASCII and 7-bit encoding.  That includes replying to Muttley after Muttley's client failed to understand the "quoted-printable" encoding and thus interpreted the quoted-printable characters naïvely.
Michael's posts do use UTF-8 when he uses non-ASCII characters, and certainly Thunderbird has no problem with the quoted-printable encoding (though it uses 8-bit encoding for its own posts when 7-bit is not enough).