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<title>Test for dynamic insertion of ruby frames</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 space should exist between 'a' and 'b':</p>

<p><span>a</span><rb></rb> <rt></rt>b</p>
<p>a<rb></rb> <rt></rt><span>b</span></p>
<p>a<rb></rb> <rt></rt><rb></rb>b</p>
<p>a<rbc></rbc> <rt></rt><rb></rb>b</p>
<p>a<rt></rt><rb></rb> <rt></rt>b</p>