old_contents: # coding: utf-8
  import requests
  
  def vimtips(msg):
      try:
          tip = requests.get('http://vim-tips.com/random_tips/json').json()
      except Exception as e:
          return None
      return u'%s\n%s' % (tip['Content'], tip['Comment'], )
  
new_contents: # coding: utf-8
  import requests
  
  def vimtips(msg=None):
      try:
          tip = requests.get('http://vim-tips.com/random_tips/json').json()
      except Exception as e:
          return None
      return u'%s\n%s' % (tip['Content'], tip['Comment'], )
  
subject: Use optional arg for vimtips