anchor.diff:  
      ;; From fns.
      :rfn :afn :self
  -   
  +
      ;; From misc.
      :ado :accum :summing :multiple :check :acheck :in :cart :rand-elt
      :rand-choice :point :defs :roundup :nearest :before
  
positive.code: 
     ;; From code.
     :codelines :codeflat :tokcount
  
     ;; Symbols to be exported from the common-lisp package. This
     ;; makes it easy to import clamp (which shadows some names) and
  
negative.code:    :w/file :swap :writec :notf :macex :macex1 :letter :alphadig
     :upcase :all :maptable :inc :dec :call :probe-file :bound :digit
     :err :lastcons :doc :seconds :inst :readstring1 :negative :positive
  
     ;; From base.
     :_ :single :if :fn
  
  