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<!DOCTYPE html>
<html lang="ja">
<meta charset="UTF-8">
<title>Dynamic break point change in ruby</title>
<link rel="stylesheet" href="support/ruby-common.css">
<style>
#test {
border: 1px solid;
text-align: center;
width: 2.5em;
}
</style>
<div id="test">
<p>一二三四五六七八</p>
<p>一二三四五六七八</p>
</div>