LayoutTests/fast/text/justify-ideograph-leading-expansion.html

<meta charset="utf-8">
<style>
    .test { margin: 8px 0; text-align: justify; border: solid; width: 100px; font-family: "hiragino mincho pro"; }
</style>
<div>
    <div class="test">
        a. b. <span>i</span>はxxxxxxx
    </div>
    <div class="test">
        a. b. iはxxxxxxx
    </div>
    <div class="test">
        xxxxxxxxxxxxxxxxxxxxx（手）
    </div>
</div>
<div style="text-rendering: optimizelegibility">
    <div class="test">
        a. b. <span>i</span>はxxxxxxx
    </div>
    <div class="test">
        a. b. iはxxxxxxx
    </div>
    <div class="test">
        xxxxxxxxxxxxxxxxxxxxx（手）
    </div>
</div>