code: def test_multiline_comments_format_option():
      text = '''# %% [markdown]
  """
  a
  long
  cell
  """
  '''
      nb = new_notebook(
          cells=[new_markdown_cell("a\nlong\ncell")],
          metadata={
              "jupytext": {
                  "cell_markers": '"""',
                  "notebook_metadata_filter": "-all",
              }
          },
      )
      py = jupytext.writes(nb, "py:percent")
      compare(py, text)
  
imports: import os
  import pytest
  from nbformat.v4.nbbase import new_code_cell, new_markdown_cell, new_notebook, new_raw_cell
  import jupytext
  from jupytext.compare import compare, compare_notebooks, notebook_model
label_desc: Use image node_id 12 for calling a global function with example usage: test_multiline_comments_format_option() without return types