eliminated datatype token;
replaced output_tokens by separate output_XXX;
replaced flag_markup by markup_true/false;
added begin/end_delim, begin/end_tag;
;;;
;;; $Id$
;;;
;;; 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")))))