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    <p>If a `code` element with class "language-mermaid" has siblings, it should be ignored</p>
    <pre>      <code class="language-mermaid">
        graph TD;
            A-->B;
            A-->C;
            B-->D;
            C-->D;
      </code>
      <code class="language-mermaid">
        graph TD;
            A-->B;
            A-->C;
            B-->D;
            C-->D;
      </code>
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