Variable: 2C-separator
2C-separator is a customizable variable defined in two-column.el.gz.
Value
""
Documentation
A string inserted between the two columns when merging.
This gets set locally by C-x 6 s (2C-split).
Source Code
;; Defined in /usr/src/emacs/lisp/textmodes/two-column.el.gz
(defcustom 2C-separator ""
"A string inserted between the two columns when merging.
This gets set locally by \\[2C-split]."
:type 'string
:local 'permanent-only)