Commit37ad126

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Doc: Fix example related to partition pruning

Append node has been removed in v12 when there would be only one subnodeunder it.Author: Amit LangoteDiscussion:https://postgr.es/m/CA+HiwqHhS62w8zUFXF4NBjvMboCXYnD-jWoWp-tfo2aHvP3Gxg@mail.gmail.comBackpatch-through: 12

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Original file line number	Diff line number	Diff line change
`@@ -4525,9 +4525,8 @@ EXPLAIN SELECT count(*) FROM measurement WHERE logdate >= DATE '2008-01-01';`
`4525`	`4525`	`QUERY PLAN`
`4526`	`4526`	`-----------------------------------------------------------------------------------`
`4527`	`4527`	`Aggregate (cost=37.75..37.76 rows=1 width=8)`
`4528`		`- -> Append (cost=0.00..36.21 rows=617 width=0)`
`4529`		`- -> Seq Scan on measurement_y2008m01 (cost=0.00..33.12 rows=617 width=0)`
`4530`		`- Filter: (logdate >= '2008-01-01'::date)`
	`4528`	`+ -> Seq Scan on measurement_y2008m01 (cost=0.00..33.12 rows=617 width=0)`
	`4529`	`+ Filter: (logdate >= '2008-01-01'::date)`
`4531`	`4530`	`</programlisting>`
`4532`	`4531`	`</para>`
`4533`	`4532`

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