Commit36be886

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doc: correct description of libpq's PQsetnonblocking() mode

Reported-by: Yugo NAGATADiscussion:https://postgr.es/m/20210713115949.702986955f8ccf23fa81073c@sraoss.co.jpBackpatch-through: 12-16, master already done

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Original file line number	Diff line number	Diff line change
`@@ -4915,11 +4915,12 @@ int PQsetnonblocking(PGconn *conn, int arg);`
`4915`	`4915`	`</para>`
`4916`	`4916`
`4917`	`4917`	`<para>`
`4918`		`- In the nonblocking state, calls to`
	`4918`	`+ In the nonblocking state,successfulcalls to`
`4919`	`4919`	`<xref linkend="libpq-PQsendQuery"/>, <xref linkend="libpq-PQputline"/>,`
`4920`	`4920`	`<xref linkend="libpq-PQputnbytes"/>, <xref linkend="libpq-PQputCopyData"/>,`
`4921`		`- and <xref linkend="libpq-PQendcopy"/> will not block but instead return`
`4922`		`- an error if they need to be called again.`
	`4921`	`+ and <xref linkend="libpq-PQendcopy"/> will not block; their changes`
	`4922`	`+ are stored in the local output buffer until they are flushed.`
	`4923`	`+ Unsuccessful calls will return an error and must be retried.`
`4923`	`4924`	`</para>`
`4924`	`4925`
`4925`	`4926`	`<para>`

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