code: def format_report(jsn):
      
      if isinstance(jsn, bytes):
          jsn = jsn.decode('utf-8')
      try:
          return json.dumps(json.loads(jsn), indent=4, sort_keys=True, separators=(',', ': '))
      except ValueError:
          return "Invalid JSON. Raw dump is below.\n\n" + jsn
docs: Given a JSON report, return a nicely formatted (i.e. with indentation) string.
          This should handle invalid JSON (as the JSON comes from the browser/user).
          We trust that Python's json library is secure, but if the JSON is invalid then we still
          want to be able to display it, rather than tripping up on a ValueError.