Variable: search-ring-update
search-ring-update is a customizable variable defined in
isearch.el.gz.
Value
nil
Documentation
Non-nil if advancing or retreating in the search ring should cause search.
Default value, nil, means edit the string instead.
Source Code
;; Defined in /usr/src/emacs/lisp/isearch.el.gz
(defcustom search-ring-update nil
"Non-nil if advancing or retreating in the search ring should cause search.
Default value, nil, means edit the string instead."
:type 'boolean)