doc: remove incorrect grammar for ALTER EVENT TRIGGER

The Parameters subsection had an extra TRIGGER in the grammar
for DISABLE/ENABLE which is incorrect.  Backpatch down to all
supported versions since it's been like this all along.

Discussion: https://postgr.es/m/0AFB171E-7E78-4A90-A140-46AB270212CA@yesql.se
Backpatch-through: v12

diff --git a/doc/src/sgml/ref/alter_event_trigger.sgml b/doc/src/sgml/ref/alter_event_trigger.sgml
index 61919f7845dbcc731ec9e6fe9529e2e60b20dc81..b79776b38d1e43f47697dde6f5947751f97587a1 100644 (file)
--- a/doc/src/sgml/ref/alter_event_trigger.sgml
+++ b/doc/src/sgml/ref/alter_event_trigger.sgml
@@ -73,7 +73,7 @@ ALTER EVENT TRIGGER name RENAME TO
    
 
    
-    DISABLE/ENABLE [ REPLICA | ALWAYS ] TRIGGER
+    DISABLE/ENABLE [ REPLICA | ALWAYS ]
     
      
       These forms configure the firing of event triggers.  A disabled trigger