Long format FROM address with newline when encoded

Go to the admin backend admin/config/content/webform and set "Long format: "Example Name" " in advanced options. In Default E-Mail values add a string with foreign characters like german umlauts "ä" in from name.
Submit a webform.
In your email client the from address will be broken.

This is because the from address is encoded in webform module line 3360 but mime_header_encode returns a string with a newline at the end. Therefore you will have something like this:
" =?UTF-8?B?Superm%C3%A4rkte?=\n "

webform_module line 3360:

if ($format == 'long' && !empty($name)) {
    $name = _webform_filter_values($name, $node, $submission, NULL, FALSE, TRUE);
    if ($encode) {
      $name = mime_header_encode($name);
    }
    return '"' . $name . '" <' . $address . '>';
  }
  else {
    return $address;
  }

The newline should be removed before returned:

if ($format == 'long' && !empty($name)) {
    $name = _webform_filter_values($name, $node, $submission, NULL, FALSE, TRUE);
    if ($encode) {
      $name = mime_header_encode($name);
    }
    $name = preg_replace("/[\n\r]/","",$name);
    return '"' . $name . '" <' . $address . '>';
  }
  else {
    return $address;
  }