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This test makes sure that tatechuyoko which directly follows ruby is properly left-aligned.
<div style="text-align: justify; max-height: 7em; font-size: 40px; -webkit-writing-mode: vertical-rl;" lang="ja">この<ruby>文章<rt style="color: white;">ルビ</rt></ruby><span style="-webkit-text-combine: horizontal;">99</span>は斜下付サンプルです。</div>
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