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<!DOCTYPE html>
<meta charset="utf-8">
<title>Test reference</title>
<style>
div {
font-size: 2em;
border: solid blue;
margin: 5px;
width: min-content;
}
#test {
word-break: auto-phrase;
}
</style>
<p>Test passes if the two boxes below are identical.
<div id=test>東京へ行きましょう。</div>
<div id=ref>東京へ行きましょう。</div>