code: def test_script_with_percent_cell_and_kernelspec(
      script="""# ---
  # jupyter:
  #   kernelspec:
  #     display_name: Python3
  #     language: python
  #     name: python3
  # ---
  
  # %%
  a = 1
  """,
  ):
      assert guess_format(script, ".py")[0] == "percent"
  
imports: import pytest
  from nbformat.v4.nbbase import new_notebook
  import jupytext
  from jupytext.compare import compare
  from jupytext.formats import JupytextFormatError, divine_format, get_format_implementation, guess_format, long_form_multiple_formats, read_format_from_metadata, rearrange_jupytext_metadata, short_form_multiple_formats, update_jupytext_formats_metadata, validate_one_format
label_desc: Use image node_id 13 for calling a global function with example usage: test_script_with_percent_cell_and_kernelspec(script) without return types