Error in sample on doc page

The following documentation comment has been logged on the website:

Page: https://www.postgresql.org/docs/13/functions-event-triggers.html
Description:

https://www.postgresql.org/docs/13/functions-event-triggers.html

Two issues here: 
1) The CREATE EVENT TRIGGER command in the sample code does not execute (see
output below)
2) When executed in an anonymous do block, there is no error. The CREATE
EVENT TRIGGER executed outside the do block should have given an error
saying already exists. Instead it gives the error: "ERROR: syntax error at
end of input".

ae_lake.cdc> do $docbug$
             BEGIN
               RAISE INFO 'Executing sample from PG docs:
https://www.postgresql.org/docs/13/functions-event-triggers.html...';
               
               CREATE FUNCTION test_event_trigger_table_rewrite_oid()
                RETURNS event_trigger
                LANGUAGE plpgsql AS
               $$
               BEGIN
                 RAISE NOTICE 'rewriting table % for reason %',

pg_event_trigger_table_rewrite_oid()::regclass,
                               pg_event_trigger_table_rewrite_reason();
               END;
               $$;
               
               CREATE EVENT TRIGGER test_table_rewrite_oid
                               ON table_rewrite
                EXECUTE FUNCTION test_event_trigger_table_rewrite_oid();
             
             END;
             $docbug$
[2021-11-14 22:47:49] [00000] Executing sample from PG docs:
https://www.postgresql.org/docs/13/functions-event-triggers.html...
[2021-11-14 22:47:49] completed in 109 ms
ae_lake.cdc> CREATE EVENT TRIGGER test_table_rewrite_oid
                               ON table_rewrite
[2021-11-14 22:48:09] [42601] ERROR: syntax error at end of input
[2021-11-14 22:48:09] Position: 79