ORA-00917: missing comma

create table tq84_ora_00917 (id integer, txt varchar2(100));

begin
   insert into tq84_ora_00917 (id, txt) values (
      42, 'A 'quoted' word.'
   );
end;
/

begin
   insert into tq84_ora_00917 (id, txt) values (
      42, q'[A 'quoted' word.]'
   );
end;
/

drop table tq84_ora_00917;