code: def test_recombine_set_tokens(self):
      tokens = (
          ["{", "1", ", ", "2", "}"],
          ["{", '"F"', ", ", '"C"', ", ", '"N"', "}", ", ", "optional"],
          [
              "{",
              "'F'",
              ", ",
              "'C'",
              ", ",
              "'N'",
              "}",
              ", ",
              "default",
              ": ",
              "None",
          ],
          [
              "{",
              "'F'",
              ", ",
              "'C'",
              ", ",
              "'N'",
              "}",
              ", ",
              "default",
              " ",
              "None",
          ],
      )
  
      combined_tokens = (
          ["{1, 2}"],
          ['{"F", "C", "N"}', ", ", "optional"],
          ["{'F', 'C', 'N'}", ", ", "default", ": ", "None"],
          ["{'F', 'C', 'N'}", ", ", "default", " ", "None"],
      )
  
      for tokens_, expected in zip(tokens, combined_tokens):
          actual = _recombine_set_tokens(tokens_)
          assert expected == actual
  
imports: import re
  from collections import namedtuple
  from inspect import cleandoc
  from textwrap import dedent
  from unittest import mock
  import pytest
  from sphinx.ext.napoleon import Config
  from sphinx.ext.napoleon.docstring import GoogleDocstring, NumpyDocstring, _convert_numpy_type_spec, _recombine_set_tokens, _token_type, _tokenize_type_spec
  from tests.test_extensions.ext_napoleon_pep526_data_google import PEP526GoogleClass
  from tests.test_extensions.ext_napoleon_pep526_data_numpy import PEP526NumpyClass
label_desc: Use image node_id 19 for calling the TestNumpyDocstring obj's underlying member method code with example usage: obj.test_recombine_set_tokens() without return types