private function renderDiff($lines1, $lines2)
{
if (!is_array($lines1)) {
$lines1 = explode("\n", $lines1);
}
if (!is_array($lines2)) {
$lines2 = explode("\n", $lines2);
}
foreach ($lines1 as $i => $line) {
$lines1[$i] = rtrim($line, "\r\n");
}
foreach ($lines2 as $i => $line) {
$lines2[$i] = rtrim($line, "\r\n");
}
$renderer = new DiffRendererHtmlInline();
$diff = new \Diff($lines1, $lines2);
return $diff->render($renderer);
}