Variable: occur-collect-regexp-history
occur-collect-regexp-history is a variable defined in replace.el.gz.
Value
("\\1")
Documentation
History of regexp for occur's collect operation.
Source Code
;; Defined in /usr/src/emacs/lisp/replace.el.gz
(defvar occur-collect-regexp-history '("\\1")
"History of regexp for occur's collect operation.")