Variable: sort-fold-case
sort-fold-case is a customizable variable defined in sort.el.gz.
Value
nil
Documentation
Non-nil if the buffer sort functions should ignore case.
Probably introduced at or before Emacs version 19.12.
Source Code
;; Defined in /usr/src/emacs/lisp/sort.el.gz
(defcustom sort-fold-case nil
"Non-nil if the buffer sort functions should ignore case."
:group 'sort
:type 'boolean)