Eli Zaretskii <eliz@gnu.org> writes:

>> From: Lars Ingebrigtsen <larsi@gnus.org>
>> Date: Wed, 05 Aug 2020 12:26:55 +0200
>> Cc: 42366@debbugs.gnu.org
>> 
>> > Compare how
>> > $ qrencode -t UTF8 x
>> > looks in
>> > $ emacs -nw -f shell # vs.
>> > $ emacs     -f shell
>> >
>> > As you can see in the latter it is quite mangled,
>> > perhaps beyond machine recognition.
>> 
>> It's not good in any case, really.  Here's the X version:
>
> Can you send the file itself?

There's no file -- it's just the output from the qrencode command.

>> Note the horizontal lines -- it should be a solid white field.
>
> How do you know that?

Because that's how it displays in the shell: