proper Envir.norm_type for result of Unify.unifiers (amending 479832ff2d29 from 20 years ago);
proper Envir.norm_type for result of Unify.unifiers (amending 479832ff2d29 from 20 years ago);

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