deblan.io-murph/src/Twig/Extension/TypoExtension.php

<?php

namespace App\Twig\Extension;

use Twig\Extension\AbstractExtension;
use Twig\TwigFilter;
use Twig\TwigFunction;

class TypoExtension extends AbstractExtension
{
    public function getFilters(): array
    {
        return [
            new TwigFilter('nbsp', [$this, 'nbsp']),
        ];
    }

    public function nbsp(string $value)
    {
        foreach (['!', '?', ':'] as $char) {
            $value = str_replace(
                sprintf(' %s', $char),
                sprintf('&nbsp;%s', $char),
                $value
            );
        }

        return $value;
    }
}