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<!DOCTYPE html>
<html>
<head>
<style> 
#t1 {
  tab-size: 4;
}
#t2 {
  tab-size: 16;
}
</style>
</head>
<body>
<h1>The tab-size Property</h1>
<pre id="t1">
I   use tab-size    4
</pre>
<pre id="t2">
I   use tab-size    16
</pre>
</body>
</html>