bug#25658: 26.0.50; ELisp part in a mail isn't encoded properly

[Katsumi Yamaoka]

Hi,

In a message draft, an ELisp part containing non-ASCII letters,
like the following, is not encoded properly.

<#part type="application/emacs-lisp" disposition=inline>
(defun mm-shr (handle)
  ...
         ;; Remove "soft hyphens".
         (goto-char (point-min))
         (while (search-forward "­" nil t)
           (replace-match "" t t))
<#/part>

This doesn't happen with Emacs 25.1.  Specifying the charset spec,
as follows, doesn't help.

<#part type="application/emacs-lisp" disposition=inline charset="utf-8">

Please note that you may want to quote mml tags when replying.

Thanks.

In GNU Emacs 26.0.50.1 (i686-pc-cygwin, GTK+ Version 3.18.9)
 of 2017-02-08 built on localhost
Windowing system distributor 'The Cygwin/X Project', version 11.0.11900000