docs: def status(config='root', num_pre=None, num_post=None):
      '''
      Returns a comparison between two snapshots
  
      config
          Configuration name.
  
      num_pre
          first snapshot ID to compare. Default is last snapshot
  
      num_post
          last snapshot ID to compare. Default is 0 (current state)
  
      CLI example:
  
      .. code-block:: bash
  
          salt '*' snapper.status
          salt '*' snapper.status num_pre=19 num_post=20
      '''
      try:
          pre, post = _get_num_interval(config, num_pre, num_post)
          snapper.CreateComparison(config, int(pre), int(post))
          files = snapper.GetFiles(config, int(pre), int(post))
          status_ret = {}
          SUBVOLUME = list_configs()[config]['SUBVOLUME']
          for file in files:
              # In case of SUBVOLUME is included in filepath we remove it
              # to prevent from filepath starting with double '/'
              _filepath = file[0][len(SUBVOLUME):] if file[0].startswith(SUBVOLUME) else file[0]
              status_ret[os.path.normpath(SUBVOLUME + _filepath)] = {'status': status_to_string(file[1])}
          return status_ret
      except dbus.DBusException as exc:
          raise CommandExecutionError(
              'Error encountered while listing changed files: {0}'
              .format(_dbus_exception_to_reason(exc, locals()))
          )