code: def fix_headers(txt):
      txt = re.sub("^# ", "## ", txt, flags=re.DOTALL | re.MULTILINE)
      txt = re.sub(
          "^### Examples?",
          "##### Examples",
          txt,
          flags=re.DOTALL | re.MULTILINE,
      )
      return txt
  
imports: import os
  import shutil
  import re
label_desc: Use image node_id 2 for calling a global function with example usage: fix_headers(txt) and returns: txt