Add a link to the manual from the defcustom doc string

* lisp/custom.el (defcustom): Add a link to the manual for the
:type element.

diff --git a/lisp/custom.el b/lisp/custom.el
index d9d0898dcb77afc189ef01107425bc6418f58d4b..bc155d32dd0cdd73f4c44b616bb64b37e133a848 100644 (file)
--- a/lisp/custom.el
+++ b/lisp/custom.el
@@ -237,6 +237,8 @@ The following keywords are meaningful:
 
 :type  VALUE should be a widget type for editing the symbol's value.
        Every `defcustom' should specify a value for this keyword.
+        See `(elisp) Customization Types' for a list of base types
+        and useful composite types.
 :options VALUE should be a list of valid members of the widget type.
 :initialize
        VALUE should be a function used to initialize the