title: stat_cor function in ggplot2: Print R and p-values on two lines
body: <p>Is it possible to Correlation-values and the p-value on two lines instead of comma-separated as is the default:</p>
  
  <pre><code>default:
  R=0.8, p=0.004
  
  want: 
  R=0.8
  p=0.004
  </code></pre>