twig svg_image() classes wrongly applied

[TheRealThor]

Grav 1.7:
Example Twig:
{{svg_image("/user/pages/img/image.svg", "h-24 w-auto")}}

Expected behaviour: css classes are attached to the SVG tag

Actually happening:
classes being applied to all subtags (paths etc) but not the SVG tag

Problem:
In the current twig function svgImageFunction() the regex matches the whole svg file instead of the SVG tag alone for the replacement

Solution:
Replace in Line 1440 of TwigExtension.php with this code:

$svg = preg_replace_callback('/^<svg[^>]*(class=\")([^"]*)(\")[^>]*>/', function($matches) use ($classes, &$matched) {
                if (isset($matches[2])) {
                    $new_classes = $matches[2] . $classes;
                    $matched = true;
                    return str_replace($matches[1], "class=\"$new_classes\"", $matches[0]);
                }
                return $matches[0];
            }, $svg
            );