(defun notmuch-show-insert-part-text/x-vcalendar (msg part content-type nth depth button)
(notmuch-show-insert-part-text/calendar msg part content-type nth depth button))
+(if (version< emacs-version "25.3")
+ ;; https://bugs.gnu.org/28350
+ ;;
+ ;; For newer emacs, we fall back to notmuch-show-insert-part-*/*
+ ;; (see notmuch-show-handlers-for)
+ (defun notmuch-show-insert-part-text/enriched (msg part content-type nth depth button)
+ ;; By requiring enriched below, we ensure that the function enriched-decode-display-prop
+ ;; is defined before it will be shadowed by the letf below. Otherwise the version
+ ;; in enriched.el may be loaded a bit later and used instead (for the first time).
+ (require 'enriched)
+ (letf (((symbol-function 'enriched-decode-display-prop)
+ (lambda (start end &optional param) (list start end))))
+ (notmuch-show-insert-part-*/* msg part content-type nth depth button))))
+
(defun notmuch-show-get-mime-type-of-application/octet-stream (part)
;; If we can deduce a MIME type from the filename of the attachment,
;; we return that.