bug#20010: 24.4; Issue with Unicode characters in package description

[Thierry Volpiatto]

João Guerra <joca.bt@gmail.com> writes:

> Packages with Unicode characters in their description mess with the
> refreshing of the package archives. A popup buffer will always be shown
> in such situations, asking for the proper coding system. This buffer
> should be Unicode by default to avoid inconvenient situations like these.
>
> For example, just by starting Emacs as normally but using the following
> .emacs.d/init.el:
>
> (require 'package)
> (setq package-archives '(("melpa" . "http://melpa.org/packages/";)
>                          ("gnu" . "http://elpa.gnu.org/packages/";)))
> (package-refresh-contents)
>
> A popup buffer will always be shown, stating:
>
> These default coding systems were tried to encode text
> in the buffer ` *temp*':
>   (iso-latin-1-dos (3420 . 37326) (3421 . 40165))
> However, each of them encountered characters it couldn't encode:
>   iso-latin-1-dos cannot encode these: 野 鳥

Easy to reproduce on Windows with just M-x list-packages.
let-binding `coding-system-for-write' to "utf-8" Fix the problem.

-- 
Thierry
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