Fix max width for multibyte keys in choice question

[marek-pietrzak-tg]

Fixes wrong key max width for ChoiceQuestion in multibyte strings

Before:

After:

To replicate you can use this code as an example:

namespace AppBundle\Command;

use Symfony\Component\Console\Command\Command;
use Symfony\Component\Console\Input\InputInterface;
use Symfony\Component\Console\Output\OutputInterface;
use Symfony\Component\Console\Question\ChoiceQuestion;

class QuesionCommand extends Command
{
    protected function configure()
    {
        $this->setName('app:question');
        $this->setDescription('Command for testing PR');
    }

    protected function execute(InputInterface $input, OutputInterface $output)
    {
        $helper = $this->getHelper('question');

        $question = new ChoiceQuestion('Choose something:',
            [
                'foo' => 'foo',
                'żółw' => 'bar',
                'łabądź' => 'baz',
                'известно' => 'lorem',
                'газета' => 'ipsum',
            ],
            0);

        $colour = $helper->ask($input, $output, $question);
        $output->writeln('you have chosen: ' . $colour);
    }
}

Q	A
Bug fix?	yes
New feature?	no
BC breaks?	no
Deprecations?	no
Tests pass?	yes
Fixed tickets	#15368
License	MIT
Doc PR	-

[nicolas-grekas]

👍
Status: reviewed

[fabpot]

Thank you @mheki.