TYPO3 Core

The function is remarkable wrong and noted like this:

    /**
     * JavaScript code added BEFORE the form is drawn:
     *
     * @return string A <script></script> section with JavaScript.
     */
    public function JStop()
    {
        $stylesheetHtml = [];
        foreach ($this->stylesheetFiles as $stylesheetFile) {
            $stylesheetHtml[] = '<link rel="stylesheet" type="text/css" href="' . $stylesheetFile . '" />';
        }
        return implode(LF, $stylesheetHtml);
    }