Tweak create_operator regress test so it doesn't illustrate

incorrect usage of commutator link.

src/test/regress/expected/create_operator.out

@@ -8,7 +8,8 @@ QUERY: CREATE OPERATOR <% (
    leftarg = point,
    rightarg = widget,
    procedure = pt_in_widget,
-   commutator = >=%
+   commutator = >% ,
+   negator = >=%
 );
 QUERY: CREATE OPERATOR @#@ (
    rightarg = int4,		

src/test/regress/sql/create_operator.sql

@@ -12,7 +12,8 @@ CREATE OPERATOR <% (
    leftarg = point,
    rightarg = widget,
    procedure = pt_in_widget,
-   commutator = >=% 
+   commutator = >% ,
+   negator = >=% 
 );
 
 CREATE OPERATOR @#@ (