How do I terminate a trigger declaration in an SQL file?

The subject says it really.

If I have a section of code in a .sql file, for example:

--start code----------

create or replace trigger trig1
before insert on webtab1
for each row
begin

   select seq1.nextval
   into :new.id
   from dual;
end;

commit;
--end code------------

then I run the code in svrmgrl:

SVRMGR> @create_demo.sql

I get this error:

MGR-00072: Warning: TRIGGER TRIG1 created with compilation errors.

Then if I do a 'show errors' I get:

Errors for TRIGGER TRIG1:
LINE/COL ERROR
--------------------------------------------------------------------------------5/1
PLS-00103: Encountered the symbol "COMMIT"

So, how do I terminate the create trigger function?

Thanks,

• Kev