Fix regression test breakage from recent change in default name of exclusion-constraint index.

src/test/regress/output/constraints.source

@@ -523,7 +523,7 @@ CREATE TABLE circles (
     (c1 WITH &&, (c2::circle) WITH &&)
     WHERE (circle_center(c1) <> '(0,0)')
 );
-NOTICE:  CREATE TABLE / EXCLUDE will create implicit index "circles_c1_c2_exclusion" for table "circles"
+NOTICE:  CREATE TABLE / EXCLUDE will create implicit index "circles_c1_c2_excl" for table "circles"
 -- these should succeed because they don't match the index predicate
 INSERT INTO circles VALUES('<(0,0), 5>', '<(0,0), 5>');
 INSERT INTO circles VALUES('<(0,0), 5>', '<(0,0), 4>');
@@ -531,7 +531,7 @@ INSERT INTO circles VALUES('<(0,0), 5>', '<(0,0), 4>');
 INSERT INTO circles VALUES('<(10,10), 10>', '<(0,0), 5>');
 -- fail, overlaps
 INSERT INTO circles VALUES('<(20,20), 10>', '<(0,0), 4>');
-ERROR:  conflicting key value violates exclusion constraint "circles_c1_c2_exclusion"
+ERROR:  conflicting key value violates exclusion constraint "circles_c1_c2_excl"
 DETAIL:  Key (c1, (c2::circle))=(<(20,20),10>, <(0,0),4>) conflicts with existing key (c1, (c2::circle))=(<(10,10),10>, <(0,0),5>).
 -- succeed because c1 doesn't overlap
 INSERT INTO circles VALUES('<(20,20), 1>', '<(0,0), 5>');
@@ -540,8 +540,8 @@ INSERT INTO circles VALUES('<(20,20), 10>', '<(10,10), 5>');
 -- should fail on existing data without the WHERE clause
 ALTER TABLE circles ADD EXCLUDE USING gist
   (c1 WITH &&, (c2::circle) WITH &&);
-NOTICE:  ALTER TABLE / ADD EXCLUDE will create implicit index "circles_c1_c2_exclusion1" for table "circles"
-ERROR:  could not create exclusion constraint "circles_c1_c2_exclusion1"
+NOTICE:  ALTER TABLE / ADD EXCLUDE will create implicit index "circles_c1_c2_excl1" for table "circles"
+ERROR:  could not create exclusion constraint "circles_c1_c2_excl1"
 DETAIL:  Key (c1, (c2::circle))=(<(0,0),5>, <(0,0),5>) conflicts with key (c1, (c2::circle))=(<(0,0),5>, <(0,0),4>).
 DROP TABLE circles;
 -- Check deferred exclusion constraint
@@ -570,7 +570,7 @@ ALTER TABLE deferred_excl DROP CONSTRAINT deferred_excl_con;
 -- This should fail, but worth testing because of HOT updates
 UPDATE deferred_excl SET f1 = 3;
 ALTER TABLE deferred_excl ADD EXCLUDE (f1 WITH =);
-NOTICE:  ALTER TABLE / ADD EXCLUDE will create implicit index "deferred_excl_f1_exclusion" for table "deferred_excl"
-ERROR:  could not create exclusion constraint "deferred_excl_f1_exclusion"
+NOTICE:  ALTER TABLE / ADD EXCLUDE will create implicit index "deferred_excl_f1_excl" for table "deferred_excl"
+ERROR:  could not create exclusion constraint "deferred_excl_f1_excl"
 DETAIL:  Key (f1)=(3) conflicts with key (f1)=(3).
 DROP TABLE deferred_excl;