minibuffer-default-add-done

minibuffer-default-add-done is a variable defined in `simple.el'.
Its value is

nil

• Automatically becomes buffer-local when set.

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'.