Variable: delimit-columns-separator
delimit-columns-separator is a customizable variable defined in
delim-col.el.gz.
Value
" "
Documentation
Specify a regexp which separates each column.
Probably introduced at or before Emacs version 21.1.
Source Code
;; Defined in /usr/src/emacs/lisp/delim-col.el.gz
(defcustom delimit-columns-separator "\t"
"Specify a regexp which separates each column."
:type '(regexp :tag "Column Separator")
:group 'columns)