code: def doc():
      """Sanitize docstrings and add custom failure explanation"""
      return SanitizedString(_sanitize_docstring)
  
imports: import contextlib
  import difflib
  import gc
  import multiprocessing
  import os
  import re
  import textwrap
  import traceback
  import pytest
label_desc: Use image node_id 8 for calling a global function with example usage: doc() and returns: SanitizedString