(customize-group-other-window): Handle groups not

yet loaded.  If buffer exists, use it unchanged.  Rename parameter
and update doc string.

1 files changed, 26 insertions, 15 deletions

diff --git a/lisp/cus-edit.el b/lisp/cus-edit.el
index b9d34f3944e..444ab4524b6 100644
--- a/lisp/cus-edit.el
+++ b/lisp/cus-edit.el
@@ -828,21 +828,32 @@ are shown; the contents of those subgroups are initially hidden."
                                     (custom-unlispify-tag-name group))))))
 
 ;;;###autoload
-(defun customize-group-other-window (symbol)
-  "Customize SYMBOL, which must be a customization group."
-  (interactive (list (completing-read "Customize group: (default emacs) "
-                                      obarray 
-                                      (lambda (symbol)
-                                        (get symbol 'custom-group))
-                                      t)))
-
-  (when (stringp symbol)
-    (if (string-equal "" symbol)
-        (setq symbol 'emacs)
-      (setq symbol (intern symbol))))
-  (custom-buffer-create-other-window
-   (list (list symbol 'custom-group))
-   (format "*Customize Group: %s*" (custom-unlispify-tag-name symbol))))
+(defun customize-group-other-window (group)
+  "Customize GROUP, which must be a customization group."
+  (interactive (list (let ((completion-ignore-case t))
+                       (completing-read "Customize group: (default emacs) "
+                                        obarray 
+                                        (lambda (symbol)
+                                          (or (get symbol 'custom-loads)
+                                              (get symbol 'custom-group)))
+                                        t))))
+  (when (stringp group)
+    (if (string-equal "" group)
+        (setq group 'emacs)
+      (setq group (intern group))))
+  (or (get group 'custom-group)
+      (custom-load-symbol group))
+  (let ((name (format "*Customize Group: %s*"
+                      (custom-unlispify-tag-name group))))
+    (if (get-buffer name)
+        (let ((window (selected-window)))
+          (switch-to-buffer-other-window name)
+          (select-window window))
+      (custom-buffer-create-other-window
+       (list (list group 'custom-group))
+       name
+       (concat " for group "
+               (custom-unlispify-tag-name group))))))
 
 ;;;###autoload
 (defalias 'customize-variable 'customize-option)