* lisp/format.el (format-alist): Make 'duden' format write-only.

(cherry picked from commit aa5c725fe7ba0a5e67ce1029061b2d887ddeb949)

diff --git a/lisp/format.el b/lisp/format.el
index 34bd30e83a5f2880cbb34d049af6ab0258db99b3..fc44436874ba3f9bcf9ea061b66e1980265c38b2 100644 (file)
--- a/lisp/format.el
+++ b/lisp/format.el
@@ -90,9 +90,9 @@
           ;; FROM-FN used to call the "diac" command which is not widely
           ;; available and apparently not under a free software license:
           ;; https://nm.wu-wien.ac.at/nm/download/file/diac4.tar.gz
-          ;; Reliable round-trip conversion is not possible anyway
-          ;; and would be by heuristic method, so use nil for now.
-          nil iso-iso2duden t nil)
+          ;; Reliable round-trip conversion is not possible anyway and
+          ;; would be by heuristic method, so make it write-only for now.
+          iso-cvt-write-only iso-iso2duden t nil)
     (de646 ,(purecopy "German ASCII (ISO 646)")
           nil
           ,(purecopy "iconv -f iso646-de -t utf-8")