etc/proofgeneral-settings.el

replace dec with double-and-decrement function

;;; Options for Proof General

;; Examples for sensible settings:

;(custom-set-variables '(isar-eta-contract nil))

;(custom-set-faces
; '(proof-locked-face
;   ((((type x) (class color) (background light)) (:background "lightsteelblue2")))))