Fix issues with loading autoloaded defcustoms while bound

* doc/lispref/customize.texi (Variable Definitions)
(Variable Definitions): Update documentation.

* lisp/custom.el (custom-initialize-set)
(custom-initialize-reset): Update doc string.
(custom-initialize-changed): Use set-default-toplevel-value.  This
fixes issues with (let ((custom-variable ...))  (autoload-function ...)).
(custom-set-default): Ditto.

* src/data.c (Fdefault_boundp): Update doc string.

1 files changed, 3 insertions, 3 deletions

diff --git a/src/data.c b/src/data.c
index 72dcf6f878d..46c0c5b6aee 100644
--- a/src/data.c
+++ b/src/data.c
@@ -1939,9 +1939,9 @@ default_value (Lisp_Object symbol)
 
 DEFUN ("default-boundp", Fdefault_boundp, Sdefault_boundp, 1, 1, 0,
        doc: /* Return t if SYMBOL has a non-void default value.
-A variable may have a buffer-local or a `let'-bound local value.  This
-function says whether the variable has a non-void value outside of the
-current context.  Also see `default-value'.  */)
+A variable may have a buffer-local value.  This function says whether
+the variable has a non-void value outside of the current buffer
+context.  Also see `default-value'.  */)
   (Lisp_Object symbol)
 {
   register Lisp_Object value;