curried_lookup/update; removed obsolete current_sign; tuned;
curried_lookup/update;
removed obsolete current_sign;
tuned;

MerelyAPseudonym/isabelle,MerelyAPseudonym/isabelle,MerelyAPseudonym/isabelle,MerelyAPseudonym/isabelle,MerelyAPseudonym/isabelle,MerelyAPseudonym/isabelle