Variable: minibuffer-default-add-done
minibuffer-default-add-done is a buffer-local variable defined in
simple.el.gz.
Documentation
When nil, add more elements to the end of the list of default values.
The value nil causes goto-history-element to add more elements to
the list of defaults when it reaches the end of this list. It does
this by calling a function defined by minibuffer-default-add-function.
Source Code
;; Defined in /usr/src/emacs/lisp/simple.el.gz
(defvar-local minibuffer-default-add-done nil
"When nil, add more elements to the end of the list of default values.
The value nil causes `goto-history-element' to add more elements to
the list of defaults when it reaches the end of this list. It does
this by calling a function defined by `minibuffer-default-add-function'.")