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<!doctype html>
<meta charset="utf-8">
<title>CSS Test Reference</title>
<style>
.clamp {
display: flow-root;
background-color: yellow;
padding: 0.5em;
font: 16px / 32px serif;
white-space: pre;
}
.float {
float: left;
background-color: orange;
padding: 0.5em;
height: 100px;
width: 100px;
}
</style>
<div class="clamp">Line 1
Line 2
Line 3
Line 4
<div class="float"></div>Line 5…</div>