Variable: table-cell-horizontal-chars
table-cell-horizontal-chars is a customizable variable defined in
table.el.gz.
Value
"-="
Documentation
Characters that may be used for table cell's horizontal border line.
Source Code
;; Defined in /usr/src/emacs/lisp/textmodes/table.el.gz
(defcustom table-cell-horizontal-chars "-="
"Characters that may be used for table cell's horizontal border line."
:tag "Cell Horizontal Boundary Characters"
:type 'string
:group 'table)