Variable: eshell-hist-event-designator
eshell-hist-event-designator is a customizable variable defined in
em-hist.el.gz.
Value
"^!\\(!\\|-?[0-9]+\\|\\??[^:^$%*?]+\\??\\|#\\)"
Documentation
The regexp used to identifier history event designators.
Source Code
;; Defined in /usr/src/emacs/lisp/eshell/em-hist.el.gz
(defcustom eshell-hist-event-designator
"^!\\(!\\|-?[0-9]+\\|\\??[^:^$%*?]+\\??\\|#\\)"
"The regexp used to identifier history event designators."
:type 'regexp)