mixfix_args: 1 for binders; string_of_mixfix: proper output of binders;
mixfix_args: 1 for binders;
string_of_mixfix: proper output of binders;

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