message i have is currently:

'1.6.0.dev0',
            'default recursive inclusion of files in directory',
            '''The bundle filespec `{spec}` corresponds to exactly one directory: if you'd like to '''
            '''continue to recursively include directory contents in future versions, please switch '''
            '''to a recursive glob like `{fixed_spec}`.'''.format(
              spec=spec,
              fixed_spec=os.path.join(spec, '**', '*'),
            )