title: highlight-indentation emacs startup
body: <p>I've been learning emacs and lisp right, so I'm sure I'm missing something, but I'm trying to get highlight-indentation to work when I start emacs.</p>
  
  <p>I've got the highlight-indentation.el file in my emacs path and after startup, I can do </p>
  
  <p>M-x highlight-indentation</p>
  
  <p>and all works well, but how do I get this to work on startup. I thought putting</p>
  
  <p>(highlight-indentation)</p>
  
  <p>in my .emacs file would work, but it didn't. Is this because highlight-indentation is an interactive function?</p>