Incorrect grammar on ALTER EVENT TRIGGER

The ALTER EVENT TRIGGER .. page has an extra TRIGGER in the parameters section
for ENABLE/DISABLE parameters which isn't supported in the grammar:

https://www.postgresql.org/docs/devel/sql-altereventtrigger.html

postgres=# alter event trigger on_login_trigger disable trigger;
ERROR: syntax error at or near "trigger"
LINE 1: alter event trigger on_login_trigger disable trigger;
^
postgres=# alter event trigger on_login_trigger enable trigger;
ERROR: syntax error at or near "trigger"
LINE 1: alter event trigger on_login_trigger enable trigger;
^
postgres=# alter event trigger on_login_trigger enable always trigger;
ERROR: syntax error at or near "trigger"
LINE 1: alter event trigger on_login_trigger enable always trigger;
^
The attached trivial patch removes the extra keyword, which needs to be
backpatched all the way down.

--
Daniel Gustafsson