title: How to add line breaks to plotly hover labels
body: <p>Is there a way to get plotly to display the hover text on multiple lines/get it to recognize special characters line '\n' in the text?</p>
  
  <p>A dummy version of what I'm looking to do is:</p>
  
  <pre><code>data &lt;- data.frame(cbind(rnorm(10, 8), rnorm(10, 2)))
  names(data)&lt;-c("thing1", "thing2")
  
  data$hovertext &lt;- paste("here's a coordinate: ",
                           round(data$thing1,1), sep = "\n")
  
  
  p &lt;- plot_ly(data, type = 'scatter', x = thing1, y = thing2, 
               text = hovertext, hoverinfo = 'text', mode = "markers")
  </code></pre>
  
  <p>Which of course just ignores the separator and prints all on one line. Can I trick plotly/R into recognizing that line break?</p>