<pre><code>code block on the first line
</code></pre>
<p>Regular text.</p>
<pre><code>code block indented by spaces
</code></pre>
<p>Regular text.</p>
<pre><code>the lines in this block  
all contain trailing spaces  
</code></pre>
<p>Regular Text.</p>
<pre><code>code block on the last line
</code></pre>