wiki-grav/plugins/shortcode-custom/CustomPrismjs.php

<?php
namespace Grav\Plugin\Shortcodes;

use Thunder\Shortcode\Shortcode\ShortcodeInterface;

class CustomPrismjs extends Shortcode
{
    public function init()
    {
        $this->shortcode->getHandlers()->add('rootsh', function(ShortcodeInterface $sc) {
            $content = rtrim(ltrim($sc->getContent()));
            return '<pre class="command-line language-sh" data-prompt="#" data-continuation-str="\" tabindex="0"><code class="language-sh">'.$content.'</code></pre>';
        });
    }
}
?>