anchor.diff:  
       AGPL3
   
  -    Copyright Pascal J. Bourguignon 2003 - 2012
  +    Copyright Pascal J. Bourguignon 2003 - 2018
   
       This program is free software: you can redistribute it and/or modify
       it under the terms of the GNU Affero General Public License as published by
  
positive.code: ;;;;LEGAL
  ;;;;    AGPL3
  ;;;;
  ;;;;    Copyright Pascal J. Bourguignon 2003 - 2016
  ;;;;
  ;;;;    This program is free software: you can redistribute it and/or modify
  ;;;;    it under the terms of the GNU Affero General Public License as published by
  
negative.code:         "COM.INFORMATIMAGO.COMMON-LISP.CESARUM.SET")
    (:shadowing-import-from "COMMON-LISP"
                            "UNION" "INTERSECTION" "MERGE")
    (:export "EDGE-CLASS" "EDGES" "NODES" "TO" "FROM" "WEIGHT" "INDEX"
             "ELEMENTS" "PROPERTIES" "IDENT" "SHOW-GRAPH" "FIND-NODES-WITH-PROPERTY"
             "COPY" "WALK-EDGES-FROM-NODE" "WALK-FROM-NODE" "FLOW-DISTANCE-FROM-NODE"
  