bug#25108: 26.0.50; info node shows octal characters instead of curvy quotes

[Eli Zaretskii]

> From: Eric Hanchrow <eric.hanchrow@gmail.com>
> Date: Wed, 07 Dec 2016 03:31:55 +0000
> Cc: 25108@debbugs.gnu.org
> 
> coding: UTF-8
> End:

Does it help to lower-case "UTF-8"?

If it does, please tell what version of makeinfo was used to produced
this file (you should find that information at the beginning of the
file).