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

diff --git a/lisp/gnus/nnmaildir.el b/lisp/gnus/nnmaildir.el
index 9cf766ee465192f58af064d038494f5ece10dd45..5461c4c960eb8f72e27bb3eeecfc2c22835978b4 100644 (file)
--- 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)