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<title>Intrinsic ISize calculation of ruby</title>
<link rel="author" title="Xidorn Quan" href="https://www.upsuper.org">
<link rel="author" title="Mozilla" href="https://www.mozilla.org">
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<p>No line break should happen in any block, and the content should just fit in the block.</p>
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<ruby><rb>ABC</rb> <rb>DEF</rb></ruby>
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XYZ <ruby><rb>ABC</rb><rb>DEF</rb></ruby> XYZ
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<ruby><rb>あい</rb> <rb>うえ</rb></ruby>
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お <ruby><rb>あい</rb><rb>うえ</rb></ruby> お
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