old_contents: from vega_datasets.core import DataLoader, LocalDataLoader
  data = DataLoader()
  local_data = LocalDataLoader()
  __version__ = '0.7.0dev0'
  
new_contents: from vega_datasets.core import DataLoader, LocalDataLoader
  data = DataLoader()
  local_data = LocalDataLoader()
  __version__ = '0.7.0'
  
subject: bump version to 0.7.0