title: Django admin list_display newline
body: <p>I try to display text with newlines in list display of admin side of Django.</p>
  
  <pre><code>class MyModelAdmin(admin.ModelAdmin):
      list_display = ('example')
  
  def example(self,obj):
      return 'TYPE : %s \n RATE : %s \n FAMILY %s'
  </code></pre>
  
  <p>However, it is displayed without newlines like <code>TYPE : xxx RATE : yyy FAMILY zzz</code>.</p>
  
  <p>How can I do this in Django admin ?</p>