Add missing message punctuation

src/backend/catalog/pg_type.c

@@ -919,7 +919,7 @@ makeMultirangeTypeName(const char *rangeTypeName, Oid typeNamespace)
 				(errcode(ERRCODE_DUPLICATE_OBJECT),
 				 errmsg("type \"%s\" already exists", buf),
 				 errdetail("Failed while creating a multirange type for type \"%s\".", rangeTypeName),
-				 errhint("You can manually specify a multirange type name using the \"multirange_type_name\" attribute")));
+				 errhint("You can manually specify a multirange type name using the \"multirange_type_name\" attribute.")));
 
 	return pstrdup(buf);
 }

src/test/regress/expected/multirangetypes.out

@@ -2929,13 +2929,13 @@ create type intmultirange as (x int, y int);
 create type intrange as range(subtype=int); -- should fail
 ERROR:  type "intmultirange" already exists
 DETAIL:  Failed while creating a multirange type for type "intrange".
-HINT:  You can manually specify a multirange type name using the "multirange_type_name" attribute
+HINT:  You can manually specify a multirange type name using the "multirange_type_name" attribute.
 drop type intmultirange;
 create type intr_multirange as (x int, y int);
 create type intr as range(subtype=int); -- should fail
 ERROR:  type "intr_multirange" already exists
 DETAIL:  Failed while creating a multirange type for type "intr".
-HINT:  You can manually specify a multirange type name using the "multirange_type_name" attribute
+HINT:  You can manually specify a multirange type name using the "multirange_type_name" attribute.
 drop type intr_multirange;
 --
 -- Test multiple multirange types over the same subtype and manual naming of