Variable: eshell-last-dir-unique
eshell-last-dir-unique is a customizable variable defined in
em-dirs.el.gz.
Value
t
Documentation
If non-nil, eshell-last-dir-ring contains only unique entries.
Source Code
;; Defined in /usr/src/emacs/lisp/eshell/em-dirs.el.gz
(defcustom eshell-last-dir-unique t
"If non-nil, `eshell-last-dir-ring' contains only unique entries."
:type 'boolean)