code: def test_multiline_python_magic(no_jupytext_version_number):
      nb = new_notebook(
          cells=[
              new_code_cell(
                  """%load_ext watermark
  %watermark -u -n -t -z \\
      -p jupytext -v
  
  def g(x):
      return x+1"""
              )
          ]
      )
  
      text = jupytext.writes(nb, "py")
      compare(
          text,
          """# +
  # %load_ext watermark
  # %watermark -u -n -t -z \\
  #     -p jupytext -v
  
  def g(x):
      return x+1
  """,
      )
      compare_notebooks(jupytext.reads(text, "py"), nb)
  
imports: import pytest
  from nbformat.v4.nbbase import new_code_cell, new_notebook
  import jupytext
  from jupytext.compare import compare, compare_notebooks, notebook_model
  from jupytext.magics import _PYTHON_MAGIC_ASSIGN, comment_magic, is_magic, uncomment_magic, unesc
label_desc: Use image node_id 16 for calling a global function with example usage: test_multiline_python_magic(no_jupytext_version_number) without return types