code: def test_pandoc_format_is_preserved():
      formats_org = "ipynb,md,.pandoc.md:pandoc,py:light"
      long = long_form_multiple_formats(formats_org)
      formats_new = short_form_multiple_formats(long)
  
      compare(formats_new, formats_org)
  
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 25 for calling a global function with example usage: test_pandoc_format_is_preserved() without return types