emacs-27 89f1634: Fix problem with non-ASCII characters in nnmaildir

[Lars Ingebrigtsen]

branch: emacs-27
commit 89f1634afcca318def07151424a21b81c70acd76
Author: Alexandre Duret-Lutz <adl@lrde.epita.fr>
Commit: Lars Ingebrigtsen <larsi@gnus.org>

    Fix problem with non-ASCII characters in nnmaildir
    
    * lisp/gnus/nnmaildir.el (nnmaildir-request-article): Enable
    multipart 8bit-content-transfer-encoded files to be displayed
    correctly by reading as `raw-text' instead of having Emacs
    (incorrectly) decode the files (bug#44307).
    
    Copyright-paperwork-exempt: yes
---
 lisp/gnus/nnmaildir.el | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/lisp/gnus/nnmaildir.el b/lisp/gnus/nnmaildir.el
index 9cf766e..5461c4c 100644
--- a/lisp/gnus/nnmaildir.el
+++ b/lisp/gnus/nnmaildir.el
@@ -1351,7 +1351,8 @@ This variable is set by `nnmaildir-request-article'.")
        (throw 'return nil))
       (with-current-buffer (or to-buffer nntp-server-buffer)
        (erase-buffer)
-       (nnheader-insert-file-contents nnmaildir-article-file-name))
+       (let ((coding-system-for-read mm-text-coding-system))
+         (mm-insert-file-contents nnmaildir-article-file-name)))
       (cons gname num-msgid))))
 
 (defun nnmaildir-request-post (&optional _server)