title: Level 4 Heading issue in R Markdown
body: <p>When I use #### for a level 4 heading, the output in pdf(latex) does not leave a line space before the paragraph begins. For example,</p>
  
  <pre><code>#### Heading 4
  
  Lorem Ipsum is simply dummy text of the printing and typesetting industry.
  Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, 
  when an unknown printer took a galley of type and scrambled it to make a type
  specimen book. 
  </code></pre>
  
  <p>Output only in pdf(latex) looks like this</p>
  
  <p><strong>Heading 4</strong> Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book. </p>
  
  <p>I have read everywhere that r markdown allows 1-6 #’s for the headings, so I am trying to figure out what am I doing wrong here.</p>
  
  <p>Also I figured I could use \subsubsubsubsection instead of #### for the heading but that gives me an error. </p>