public/422.html
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<title>Cardslap - rejected</title>
<link href="/assets/application.css?body=1" media="screen" rel="stylesheet" type="text/css" />
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<div class="wrapper">
<header>
<h1>Cardslap</h1>
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<p>Sorry, but there's been a 422 error, the change you wanted was rejected - <a href="/">back to Cardslap</a></p>
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</body>
</html>