bug#24175: artist mode rectangle shows ugly in Emacs

[Lars Ingebrigtsen]

Eli Zaretskii <eliz@gnu.org> writes:

>> From: Dean Chen <dean.chen@graphsql.com>
>> Date: Sun, 7 Aug 2016 13:22:12 +0800
>> 
>> I am trying draw rectangle today in Emacs with artist mode. It looks weird, 
>> see following screenshot.
>> Inline image 1
>> 
>> But if I open this text file with chromium browser instead of emacs, it 
>> looks normally. I guess the way that
>> Emacs render this rectangle has a bug.
>
> I think the problem is that your default font is a proportional one.
> You should use a fixed-pitch font when you work with artist mode.

Should artist-mode perhaps error out if the default font is a
proportional font?

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