title: R kable_styling disappears to print in html
body: <p>I have a markdown file, with table where i want put one row on two in shadow, so i use : </p>
  
  <pre><code>kable(DF,"html", caption="graph")%&gt;%
  kable_styling(bootstrap_options=c("striped","hover")) 
  </code></pre>
  
  <p>on the explorer it's working, but when i want to print it, there is nothing anymore, only the table without shadow to be more readable...</p>
  
  <p>I tried to print in PDF to check but it doesn't work too, i have the error '"url.sty" not found' and i don't arrive to install it manually...  I continue to try for the moment with tuto on internet, because on my work computer i don't have connection internet.</p>