doc: Replace non-ASCII lines in psql example output

Author: petere

doc/src/sgml/ddl.sgml

@@ -3812,7 +3812,7 @@ SELECT count(*) FROM measurement WHERE logdate >= DATE '2008-01-01';
 SET enable_partition_pruning = off;
 EXPLAIN SELECT count(*) FROM measurement WHERE logdate >= DATE '2008-01-01';
                                     QUERY PLAN
-───────────────────────────────────────────────────────────────────────────────────
+-----------------------------------------------------------------------------------
  Aggregate  (cost=188.76..188.77 rows=1 width=8)
    ->  Append  (cost=0.00..181.05 rows=3085 width=0)
          ->  Seq Scan on measurement_y2006m02  (cost=0.00..33.12 rows=617 width=0)
@@ -3837,7 +3837,7 @@ EXPLAIN SELECT count(*) FROM measurement WHERE logdate >= DATE '2008-01-01';
 SET enable_partition_pruning = on;
 EXPLAIN SELECT count(*) FROM measurement WHERE logdate >= DATE '2008-01-01';
                                     QUERY PLAN
-───────────────────────────────────────────────────────────────────────────────────
+-----------------------------------------------------------------------------------
  Aggregate  (cost=37.75..37.76 rows=1 width=8)
    ->  Append  (cost=0.00..36.21 rows=617 width=0)
          ->  Seq Scan on measurement_y2008m01  (cost=0.00..33.12 rows=617 width=0)