old_contents: version = (1, 5, 0, 'r1')
  version_string = ".".join(map(str,version))
  release_date = "2015.07.17"
  
new_contents: version = (1, 5, 0)
  version_string = ".".join(map(str,version))
  release_date = "2015.07.17"
  
subject: Update version.py