anchor.diff:  ;;;;AUTHORS
   ;;;;    <PJB> Pascal J. Bourguignon <pjb@informatimago.com>
   ;;;;MODIFICATIONS
  +;;;;    2015-06-13 <PJB> Added CHRONO.
   ;;;;    2014-10-22 <PJB> Added hash-table-to-sexp and sexp-to-hash-table.
   ;;;;    2013-06-30 <PJB> Added FLOAT-{,C,E}TYPECASE; exported [-+]EPSILON.
   ;;;;    2008-06-24 <PJB> Added INCF-MOD and DECF-MOD.
  
positive.code:    ;;
     "XOR" "EQUIV" "IMPLY"
     ;; "SET-EQUAL"
     )
    (:documentation
     "
  
negative.code: ;;;;    You should have received a copy of the GNU Affero General Public License
  ;;;;    along with this program.  If not, see <http://www.gnu.org/licenses/>
  ;;;;****************************************************************************
  
  (in-package "COMMON-LISP-USER")
  (defpackage "COM.INFORMATIMAGO.COMMON-LISP.CESARUM.UTILITY"
    (:use "COMMON-LISP"
  