<p>Preserve blank lines in code blocks with tabs:</p> <pre><code>a code block two tabbed lines three tabbed lines four tabbed lines five tabbed lines six tabbed lines End of tabbed block </code></pre> <p>And without tabs:</p> <pre><code>a code block two blank lines three blank lines four blank lines five blank lines six blank lines End of block </code></pre> <p>End of document</p>