Doc: Fix pageinspect bt_page_items() example.
Oversight in commit
@@ -358,7 +358,7 @@ btpo_flags | 3
all of the items on a B-tree index page. For example:
<screen>
test=# SELECT itemoffset, ctid, itemlen, nulls, vars, data, dead, htid, tids[0:2] AS some_tids
- FROM bt_page_items(get_raw_page('tenk2_hundred', 5));
+ FROM bt_page_items('tenk2_hundred', 5);
itemoffset | ctid | itemlen | nulls | vars | data | dead | htid | some_tids
------------+-----------+---------+-------+------+-------------------------+------+--------+---------------------
1 | (16,1) | 16 | f | f | 30 00 00 00 00 00 00 00 | | |
