code: def test_read_empty_code_cell(
      script='''"""
  Markdown cell
  """
  
  
  ''',
  ):
      nb = jupytext.reads(script, "py:sphinx")
  
      assert nb.cells[0].cell_type == "code"
      assert nb.cells[0].source == "%matplotlib inline"
  
      assert nb.cells[1].cell_type == "markdown"
      assert nb.cells[1].source == "Markdown cell"
  
      assert nb.cells[2].cell_type == "code"
      assert nb.cells[2].source == ""
  
      assert len(nb.cells) == 3
  
      assert jupytext.writes(nb, "py:sphinx") == script
  
imports: import jupytext
  from jupytext.compare import compare
label_desc: Use image node_id 3 for calling a global function with example usage: test_read_empty_code_cell(script) without return types