Text.php
protected function wrapChildrenWithP(\DOMElement $parentEl, $lineNumbered)
    {
        $childNodes = [];
        while ($parentEl->childNodes->length > 0) {
            $el = $parentEl->firstChild;
            $parentEl->removeChild($el);
            $childNodes[] = $el;
        }

        $appendNode = null;
        foreach ($childNodes as $childNode) {
            if (in_array(strtolower($childNode->nodeName), ['p', 'list'])) {
                if ($appendNode) {
                    $parentEl->appendChild($appendNode);
                    $appendNode = null;
                }
                $parentEl->appendChild($childNode);
            } else {
                if (!$appendNode) {
                    $appendNode = $this->getNextNodeTemplate($lineNumbered);
                }
                $appendNode->appendChild($childNode);
            }
        }
        if ($appendNode) {
            $parentEl->appendChild($appendNode);
        }

        return $parentEl;
    }
protected function wrapChildrenWithP(\DOMElement $parentEl, $lineNumbered)
    {
        $childNodes = [];
        while ($parentEl->childNodes->length > 0) {
            $el = $parentEl->firstChild;
            $parentEl->removeChild($el);
            $childNodes[] = $el;
        }

        $appendNode = null;
        foreach ($childNodes as $childNode) {
            if (in_array(strtolower($childNode->nodeName), ['p', 'list'])) {
                if ($appendNode) {
                    $parentEl->appendChild($appendNode);
                    $appendNode = null;
                }
                $parentEl->appendChild($childNode);
            } else {
                if (!$appendNode) {
                    $appendNode = $this->getNextNodeTemplate($lineNumbered);
                }
                $appendNode->appendChild($childNode);
            }
        }
        if ($appendNode) {
            $parentEl->appendChild($appendNode);
        }

        return $parentEl;
    }
Wraps all child nodes with text:p nodes, if necessary
(it's not necessary for child nodes that are p's themselves or lists)

@param \DOMElement $parentEl
@param boolean $lineNumbered

@return \DOMElement