docs: def put_fileset(self, fileset):
          """
          Inserts or updates a fileset in the repository
          """
          target_path = self.fileset_path(fileset)
          if op.isfile(fileset.path):
              shutil.copyfile(fileset.path, target_path)
              # Copy side car files into repository
              for aux_name, aux_path in fileset.format.default_aux_file_paths(
                      target_path).items():
                  shutil.copyfile(self.aux_file[aux_name], aux_path)
          elif op.isdir(fileset.path):
              if op.exists(target_path):
                  shutil.rmtree(target_path)
              shutil.copytree(fileset.path, target_path)
          else:
              assert False