Fix readme

README.Rmd

@@ -27,7 +27,7 @@ output:
 Then, in the first knitr chunk, try this:
 
 ````markdown
-```{r setup} `r ''`
+```{r setup}`r ""`
 options(htmltools.dir.version = FALSE)
 library(xaringanthemer)
 mono_dark(

README.html

@@ -322,7 +322,7 @@ $(document).ready(function () {
     lib_dir: libs
     css: xaringan-themed.css</code></pre>
 <p>Then, in the first knitr chunk, try this:</p>
-<pre class="markdown"><code>```{r setup} 
+<pre class="markdown"><code>```{r setup}
 options(htmltools.dir.version = FALSE)
 library(xaringanthemer)
 mono_dark(