Improve type of custom-theme-directory (Bug#65401)

* lisp/custom.el (custom-theme-directory): Make it of type directory.

diff --git a/lisp/custom.el b/lisp/custom.el
index 083349e3591947f1640ce7b695d3332ab08d4b0c..5c134ff7f13be8c3815d4bdcd80f273ad23367a9 100644 (file)
--- a/lisp/custom.el
+++ b/lisp/custom.el
@@ -1208,7 +1208,7 @@ The command `customize-create-theme' writes theme files into this
 directory.  By default, Emacs searches for custom themes in this
 directory first---see `custom-theme-load-path'."
   :initialize #'custom-initialize-delay
-  :type 'string
+  :type 'directory
   :group 'customize
   :version "22.1")