code: def _display(s):
      """Markup the given string for useful display."""
      if not isinstance(s, str):
          s = s.decode("utf-8")
      s = _indent(_escaped_text_from_text(s, "whitespace"), 4)
      if not s.endswith("\n"):
          s += "\n"
      return s
  
imports: import os
  import sys
  from os.path import join, dirname, abspath, exists, splitext, basename
  import re
  from glob import glob
  import unittest
  import codecs
  import difflib
  import doctest
  from json import loads
label_desc: Use image node_id 4 for calling a global function with example usage: _display(s) and returns: s