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bug#19889: bug#22207: emacs-25 mishandles info code text on Fedora 23

From: Paul Eggert
Subject: bug#19889: bug#22207: emacs-25 mishandles info code text on Fedora 23
Date: Fri, 6 May 2016 11:24:14 -0700
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.0

On 05/06/2016 10:18 AM, Eli Zaretskii wrote:
We could specify the font explicitly.

>More specifically: is it the introduction of ‘fixed-pitch-serif’
>that you’re objecting to, or the addition of FreeMono and Nimbus
>Mono L as fonts to look for
The latter.  I see that as a (perhaps complicated and a bit
unreliable) way of specifying a font which we know we want to get as
result.  If so, why not specify the font explicitly?

The problem is, which font to specify explicitly? Not all platforms have a font named "Courier". Mine doesn't (Fedora 23). If we knew that all Emacs platforms had an appropriate font (Courier, or FreeMono, or Nimbus Mono L, or whatever), we could specify that font, but I do not know of any such font, nor do I know how to query arbitrary platforms for such a font.

In further testing on my Fedora 23 host I discovered another suitable anti-aliased font, Courier 10 Pitch. It is also a free font and looks a bit better with emacs -Q, and Wikipedia says Courier 10 Pitch BT is the default Courier font on many GNU/Linux hosts <https://en.wikipedia.org/wiki/Courier_%28typeface%29#Courier_10_Pitch_BT>. So I will update my proposed patch to prefer Courier 10 Pitch to the alternatives already in the list.

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