title: How to display verbatim inline r code with backticks using Rmarkdown?
body: <p>By doubling the backticks in Markdown, it is easy to render some text in code style including the backticks, such as: <code>`r 2+2`</code>.
  But how to do that with <em>RMarkdown</em> ? By the same way we can display <code>`t 2+2`</code>, but replacing <code>t</code> with <code>r</code> executes the R code <code>2+2</code>.</p>
  
  <p>The only way I have found so far is:</p>
  
  <pre><code>&lt;p&gt;&lt;code  class="r"&gt;`&lt;/code&gt;&lt;code class="r"&gt;r 2+2`&lt;/code&gt;&lt;/p&gt;
  </code></pre>
  
  <p>Not very convenient. Maybe I should define a new css for doing that more conveniently ?</p>