Fix bug in customizing `mail-sources' variable (bug#25274)

* lisp/gnus/mail-source.el (mail-sources): Use list instead of cons
for lone argument. (bug#25274) (tiny change)

diff --git a/lisp/gnus/mail-source.el b/lisp/gnus/mail-source.el
index 59a97dbb8c613e2046be4092deb14b65fca760ea..8b7c8e08475cac6414e4e00aff586991d4f43be3 100644 (file)
--- a/lisp/gnus/mail-source.el
+++ b/lisp/gnus/mail-source.el
@@ -66,7 +66,7 @@ See Info node `(gnus)Mail Source Specifiers'."
          (repeat :tag "List"
           (choice :format "%[Value Menu%] %v"
                   :value (file)
-                  (cons :tag "Group parameter `mail-source'"
+                  (list :tag "Group parameter `mail-source'"
                         (const :format "" group))
                   (cons :tag "Spool file"
                         (const :format "" file)