Commit5368a23

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docs: document TRIM "comma" syntax

This syntax is supported by the parser, but is non-standard._Not_ backpatched to 9.3 in case we change our minds.

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Original file line number	Diff line number	Diff line change
`@@ -1293,6 +1293,25 @@`
`1293`	`1293`	`<entry><literal>Tom</literal></entry>`
`1294`	`1294`	`</row>`
`1295`	`1295`
	`1296`	`+ <row>`
	`1297`	`+ <entry>`
	`1298`	`+ <indexterm>`
	`1299`	`+ <primary>trim</primary>`
	`1300`	`+ </indexterm>`
	`1301`	`+ <literal><function>trim(<optional>leading \| trailing`
	`1302`	`+ \| both</optional> <optional>from</optional>`
	`1303`	`+ <parameter>string</parameter>`
	`1304`	`+ <optional><parameter>, characters</parameter></optional>`
	`1305`	`+ )</function></literal>`
	`1306`	`+ </entry>`
	`1307`	`+ <entry><type>text</type></entry>`
	`1308`	`+ <entry>`
	`1309`	`+ Non-standard version of <function>trim()</>`
	`1310`	`+ </entry>`
	`1311`	`+ <entry><literal>trim(both from 'xTomxx', 'x')</literal></entry>`
	`1312`	`+ <entry><literal>Tom</literal></entry>`
	`1313`	`+ </row>`
	`1314`	`+`
`1296`	`1315`	`<row>`
`1297`	`1316`	`<entry>`
`1298`	`1317`	`<indexterm>`

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