Allow separator in code

[kalaspuffar]

Trying to solve: https://github.com/nlbdev/nordic-epub3-dtbook-migrator/issues/521

[kalaspuffar]

Hi @josteinaj

I think I misunderstood the task. I've changed the rules to follow what you've written above. Now this code example will pass validation.

            <pre><code>
        public static void main(String[] args) {
            ...
        }
        </code></pre>
            <hr class="separator"/>
            <pre><code>
        public static void main(String[] args) {
            ...
        }
        </code></pre>

Best regards Daniel