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minor#16870 [Console] Update questionhelper.rst (issamkhadiri1989)

This PR was submitted for the 6.0 branch but it was merged into the 4.4 branch instead.Discussion----------[Console] Update questionhelper.rsthello,when running the example as it is, a deprecation message is shown (i'm on PHP 8.1.6). the deprecation message says that ``trim(): Passing null to parameter#1 ($string) of type string is deprecated``.what if we add a normalizer that returns an empty string when the entered value is `null` otherwise returns the user's intial input. with this suggestion, the example works greatCommits-------bf9e245 Update questionhelper.rst

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`‎components/console/helpers/questionhelper.rst‎`

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Original file line number	Diff line number	Diff line change
`@@ -384,6 +384,9 @@ You can also use a validator with a hidden question::`
`384`	`384`	`$helper = $this->getHelper('question');`
`385`	`385`
`386`	`386`	`$question = new Question('Please enter your password');`
	`387`	`+ $question->setNormalizer(function ($value) {`
	`388`	`+ return null === $value ? '' : $value;`
	`389`	`+ });`
`387`	`390`	`$question->setValidator(function ($value) {`
`388`	`391`	`if (trim($value) == '') {`
`389`	`392`	`throw new \Exception('The password cannot be empty');`

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`‎components/console/helpers/questionhelper.rst‎`

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