org.el: Prevent the display of messages when cycling from with a Gnus article buffer.

* org.el (org-cycle-internal-global): Prevent the display of
messages when cycling from with a Gnus article buffer.

lisp/org.el

@@ -6210,34 +6210,36 @@ in special contexts.
 
 (defun org-cycle-internal-global ()
   "Do the global cycling action."
-  (cond
-   ((and (eq last-command this-command)
-	 (eq org-cycle-global-status 'overview))
-    ;; We just created the overview - now do table of contents
-    ;; This can be slow in very large buffers, so indicate action
-    (run-hook-with-args 'org-pre-cycle-hook 'contents)
-    (message "CONTENTS...")
-    (org-content)
-    (message "CONTENTS...done")
-    (setq org-cycle-global-status 'contents)
-    (run-hook-with-args 'org-cycle-hook 'contents))
-
-   ((and (eq last-command this-command)
-	 (eq org-cycle-global-status 'contents))
-    ;; We just showed the table of contents - now show everything
-    (run-hook-with-args 'org-pre-cycle-hook 'all)
-    (show-all)
-    (message "SHOW ALL")
-    (setq org-cycle-global-status 'all)
-    (run-hook-with-args 'org-cycle-hook 'all))
+  ;; Hack to avoid display of messages for .org  attachments in Gnus
+  (let ((ga (string-match "\\*fontification" (buffer-name))))
+    (cond
+     ((and (eq last-command this-command)
+	   (eq org-cycle-global-status 'overview))
+      ;; We just created the overview - now do table of contents
+      ;; This can be slow in very large buffers, so indicate action
+      (run-hook-with-args 'org-pre-cycle-hook 'contents)
+      (unless ga (message "CONTENTS..."))
+      (org-content)
+      (unless ga (message "CONTENTS...done"))
+      (setq org-cycle-global-status 'contents)
+      (run-hook-with-args 'org-cycle-hook 'contents))
+
+     ((and (eq last-command this-command)
+	   (eq org-cycle-global-status 'contents))
+      ;; We just showed the table of contents - now show everything
+      (run-hook-with-args 'org-pre-cycle-hook 'all)
+      (show-all)
+      (unless ga (message "SHOW ALL"))
+      (setq org-cycle-global-status 'all)
+      (run-hook-with-args 'org-cycle-hook 'all))
 
-   (t
-    ;; Default action: go to overview
-    (run-hook-with-args 'org-pre-cycle-hook 'overview)
-    (org-overview)
-    (message "OVERVIEW")
-    (setq org-cycle-global-status 'overview)
-    (run-hook-with-args 'org-cycle-hook 'overview))))
+     (t
+      ;; Default action: go to overview
+      (run-hook-with-args 'org-pre-cycle-hook 'overview)
+      (org-overview)
+      (unless ga (message "OVERVIEW"))
+      (setq org-cycle-global-status 'overview)
+      (run-hook-with-args 'org-cycle-hook 'overview)))))
 
 (defun org-cycle-internal-local ()
   "Do the local cycling action."