Fix sample output for hash_metapage_info query

One output column was duplicated.  Couldn't resist fixing the version
number while at it.

Reported-by: Gianni Ciolli

doc/src/sgml/pageinspect.sgml

@@ -695,9 +695,8 @@ test-#     regexp_replace(spares::text, '(,0)*}', '}') as spares,
 test-#     regexp_replace(mapp::text, '(,0)*}', '}') as mapp
 test-# FROM hash_metapage_info(get_raw_page('con_hash_index', 0));
 -[ RECORD 1 ]-------------------------------------------------------------------------------
-spares    | {0,0,0,0,0,0,1,1,1,1,1,1,1,1,3,4,4,4,45,55,58,59,508,567,628,704,1193,1202,1204}
 magic     | 105121344
-version   | 3
+version   | 4
 ntuples   | 500500
 ffactor   | 40
 bsize     | 8152