anchor.diff:     #:and-bind
      #:if2-bind
      #:aif2
  -;; #:while ;; iterate
  +;; #:while ; iterate
      #:awhile
  -;; #:until ;; iterate
  +;; #:until ; iterate
      #:it
      #:whichever
      #:xor
  
positive.code:    #:the-form
     #:extract-argument-names
     #:walk-lambda-list
  
     #:unwalk-form
  
     #:to-cps
     #:with-call/cc
  
negative.code:    #:with-collector
     #:with-collectors
  
     #:form
     #:walk-form
     #:make-walk-env
     #:*walk-handlers*
  