code: def fix_c1_controls(text):
      """
      If text still contains C1 control characters, treat them as their
      Windows-1252 equivalents. This matches what Web browsers do.
      """
      return C1_CONTROL_RE.sub(_c1_fixer, text)
  
imports: import codecs
  import html
  import re
  import warnings
  import ftfy
  from ftfy.chardata import ALTERED_UTF8_RE, C1_CONTROL_RE, CONTROL_CHARS, DOUBLE_QUOTE_RE, HTML_ENTITIES, HTML_ENTITY_RE, LIGATURES, LOSSY_UTF8_RE, SINGLE_QUOTE_RE, UTF8_DETECTOR_RE, WIDTH_MAP
  from ftfy.badness import is_bad
label_desc: Use image node_id 20 for calling a global function with example usage: fix_c1_controls(text) and returns: C1_CONTROL_RE