k, thin, thick in this order and match the reference rendering.</p>
    <div class="test"><span class="thin_underline">aaGaa</span></div>
    <div class="test"><span class="thick_underline">aaGaa</span></div>
    <div class="test"><span class="thin_underline">aaGaa</span></div>
    <div class="test"><span class="thick_underline">aaGaa</span></div>
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