Stop html encoding

In my gridview, I setup a column such as

[
    'label' => 'Client Contact',
    'format' => 'raw',
    'value' => function ($model) {
        if ($model->contact === null) {
            return '-';
        }

        return Html::tag(
            'span',
            $model->contact->FullName,
            [
                'data-toggle'  => 'popover',
                'data-placement' => 'top',
                'data-content' => $model->contact->ContactInfo,
                'data-html'    => 'true',
                'style'        => 'cursor:pointer;text-decoration:underline',
            ]
        );
    },
],

Where

$model->contact->ContactInfo

outputs an HTML string that I want used in a popover. My issue is that although I confirmed it properly outputs the HTML string I want, for some reason, when it is used in the ‘Html::tag(…’ it always gets encoded and thus displays all the HTML tags as gibberish.

Is there a way to tell yii2 not to ‘help’ and not encode what is passed to it? I’m hoping I overlooked something in the documentation.

Right now, my fix was to manually write the complete HTML for the entire tag myself and not use the helper.