Variable: bidi-directional-non-controls-chars
bidi-directional-non-controls-chars is a variable defined in
simple.el.gz.
Value
"^--"
Documentation
Character set that matches any character except bidirectional controls.
Source Code
;; Defined in /usr/src/emacs/lisp/simple.el.gz
(defvar bidi-directional-non-controls-chars "^\x202a-\x202e\x2066-\x2069"
"Character set that matches any character except bidirectional controls.")