Cross-link message-expand-name-standard-ui-relevant doc strings

* lisp/gnus/message.el (message-expand-name-standard-ui): Mention
the other relevant variables in the doc string (bug#50667).

diff --git a/lisp/gnus/message.el b/lisp/gnus/message.el
index a6c6a16653dc7a2b670ac375465dedba32103e72..869ab3f82b7bafd69ba98af5ac6d282ebd1a32a8 100644 (file)
--- a/lisp/gnus/message.el
+++ b/lisp/gnus/message.el
@@ -8369,7 +8369,11 @@ regular text mode tabbing command."
 
 (defcustom message-expand-name-standard-ui nil
   "If non-nil, use the standard completion UI in `message-expand-name'.
-E.g. this means it will obey `completion-styles' and other such settings."
+E.g. this means it will obey `completion-styles' and other such settings.
+
+If this variable is non-nil and `message-mail-alias-type' is
+`ecomplete', `message-self-insert-commands' should probably be
+set to nil."
   :version "27.1"
   :type 'boolean)