Variable: sh-remember-variable-min
sh-remember-variable-min is a customizable variable defined in
sh-script.el.gz.
Value
3
Documentation
Don't remember variables less than this length for completing reads.
Source Code
;; Defined in /usr/src/emacs/lisp/progmodes/sh-script.el.gz
(defcustom sh-remember-variable-min 3
"Don't remember variables less than this length for completing reads."
:type 'integer
:group 'sh-script)