simplified handling of authentic syntax (cf. early externing in consts.ML); simplified extern_term;
simplified handling of authentic syntax (cf. early externing in consts.ML);
simplified extern_term;

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