old_contents: 
  VERSION = (1, 3, 0, 'dev')
  __version__ = ''.join(['-.'[type(x) == int]+str(x) for x in VERSION])[1:]
  
  
  
new_contents: 
  VERSION = (1, 3, 0)
  __version__ = ''.join(['-.'[type(x) == int]+str(x) for x in VERSION])[1:]
  
  
  
subject: drop -dev from 1.3.0