old_contents: _MAJOR = "0"
  _MINOR = "5"
  _REVISION = "2-unreleased"
  
  VERSION_SHORT = "{0}.{1}".format(_MAJOR, _MINOR)
  VERSION = "{0}.{1}.{2}".format(_MAJOR, _MINOR, _REVISION)
  
new_contents: _MAJOR = "0"
  _MINOR = "6"
  _REVISION = "0"
  
  VERSION_SHORT = "{0}.{1}".format(_MAJOR, _MINOR)
  VERSION = "{0}.{1}.{2}".format(_MAJOR, _MINOR, _REVISION)
  
subject: bump version number to v0.6.0