public/422.html
<!DOCTYPE html>
<html>
<head>
<title>The change you wanted was rejected (422)</title>
<style type="text/css">
body { background-color: #fff; color: #666; text-align: center; font-family: arial, sans-serif; }
div.dialog {
width: 25em;
padding: 0 4em;
margin: 4em auto 0 auto;
border: 1px solid #ccc;
border-right-color: #999;
border-bottom-color: #999;
}
h1 { font-size: 100%; color: #f00; line-height: 1.5em; }
</style>
</head>
<body>
<!-- This file lives in public/422.html -->
<div class="dialog">
<h1>The change you wanted was rejected.</h1>
<p>Maybe you tried to change something you didn't have access to.</p>
</div>
</body>
</html>