old_contents: from tsuru_dashboard import engine
  
  class AutoScaleTab(engine.Tab):
      name = 'autoscale'
      url_name = 'autoscale-app-info'
  
  try:
      engine.get('app').register_tab(AutoScaleTab)
  except engine.AppNotFound:
      pass
  
new_contents: from tsuru_dashboard import engine
  
  
  class AutoScaleTab(engine.Tab):
      name = 'autoscale'
      url_name = 'autoscale-app-info'
  
  try:
      engine.get('app').register_tab(AutoScaleTab)
  except engine.AppNotFound:
      pass
  
subject: fix formating