    <ul>
        <li>Code block first in file</li>
        <li>doesn't work under some circumstances</li>
    </ul>

As above: checking for bad interractions with the HTML block parser:

    <div>

Some markdown `formatting`.

    </div>

Some markdown

    <div>
        <html>

    function test();

    <html>
        <title>

    <html>
        <title>

Two code blocks with no blank line between them:

    <div>

    <div>

Testing confusion with markers in the middle:

    <div>~~~</div>

Testing mixing with title code blocks

    <p>```
    ```
    <p>```

    <p>```
    ~~~
    <p>```