Variable: mode-line-buffer-identification

mode-line-buffer-identification is a buffer-local variable defined in bindings.el.gz.

Documentation

Mode line construct for identifying the buffer being displayed.

Its default value is ("%12b") with some text properties added. Major modes that edit things other than ordinary files may change this
(e.g. Info, Dired,...)

Probably introduced at or before Emacs version 18.

Source Code

;; Defined in /usr/src/emacs/lisp/bindings.el.gz
(defvar-local mode-line-buffer-identification
  (propertized-buffer-identification "%12b")
  "Mode line construct for identifying the buffer being displayed.
Its default value is (\"%12b\") with some text properties added.
Major modes that edit things other than ordinary files may change this
\(e.g. Info, Dired,...)")