* message.el (message-expand-group): Pass the common

prefix substring of completion to `display-completion-list'.

* mh-comp.el (mh-complete-word): Pass the common
prefix substring of completion to `display-completion-list'.

* dabbrev.el (dabbrev-completion): Pass the common
prefix substring of completion to `display-completion-list'.

* filecache.el (file-cache-minibuffer-complete)
(file-cache-complete): Ditto.

* tempo.el (tempo-display-completions): Ditto.

* wid-edit.el (widget-file-complete, widget-color-complete): Ditto.

* emacs-lisp/lisp.el (lisp-complete-symbol): Ditto.

* eshell/em-hist.el (eshell-list-history): Ditto.

* mail/mailabbrev.el (mail-abbrev-complete-alias): Ditto.

* progmodes/etags.el (complete-tag): Ditto.

* progmodes/make-mode.el (makefile-complete): Ditto.

* progmodes/meta-mode.el (meta-complete-symbol): Ditto.

* progmodes/octave-mod.el (octave-complete-symbol): Ditto.

* progmodes/pascal.el (pascal-complete-word)
(pascal-show-completions): Ditto.

* textmodes/bibtex.el (bibtex-complete-internal): Ditto.

* simple.el (completion-common-substring): New variable.
(completion-setup-function): Use `completion-common-substring'
to put faces.

* minibuf.c (Fdisplay_completion_list): Add new optional
argument COMMON_SUBSTRING. Bind `completion-common-substring'
to the optional argument during running `completion-setup-hook'.

2 files changed, 6 insertions, 1 deletions

diff --git a/lisp/gnus/ChangeLog b/lisp/gnus/ChangeLog
index abbfb096ab1..ba1298f3650 100644
--- a/lisp/gnus/ChangeLog
+++ b/lisp/gnus/ChangeLog
@@ -1,3 +1,8 @@
+2005-10-16  Masatake YAMATO  <jet@gyve.org>
+
+        * message.el (message-expand-group): Pass the common
+        prefix substring of completion to `display-completion-list'.
+
 2005-10-09  Daniel Brockman <daniel@brockman.se>
 
         * format-spec.el (format-spec): Propagate text properties of % spec.
diff --git a/lisp/gnus/message.el b/lisp/gnus/message.el
index d64d8dbd2bf..b7607ad30e0 100644
--- a/lisp/gnus/message.el
+++ b/lisp/gnus/message.el
@@ -6691,7 +6691,7 @@ those headers."
           (let ((buffer-read-only nil))
             (erase-buffer)
             (let ((standard-output (current-buffer)))
-              (display-completion-list (sort completions 'string<)))
+              (display-completion-list (sort completions 'string<) string))
             (goto-char (point-min))
             (delete-region (point) (progn (forward-line 3) (point))))))))))