title: Change printed variable names for summary()
body: <p>I am using <code>summary()</code> to create a, yes, summary from my regression. What now is printed is my variable names, including underscore.</p>
  
  <p>Is there any way to change the printed variable names so that I can see e.g. "Age of dog" instead of <code>dog_age</code>.</p>
  
  <p>I can not change the variable names since they can not contain spaces.</p>