docs: def ansi_c_quoting(s):
      '''shlex does not handle ANSI-C Quoting properly. Words of the form
      $'string' are treated specially. The word expands to string, with
      backslash-escaped characters replaced as specified by the ANSI C
      standard. This is a hacky workaround to parse these the way we want to.'''
      in_single_quotes = False
      in_double_quotes = False
      maybe_ansi_c_quote = False
      in_ansi_c_quote = False
      to_del = []
      s = list(s)
  
      for index, ch in enumerate(s):
          if ch == '\'':
              if in_ansi_c_quote:
                  in_ansi_c_quote = toggle(in_ansi_c_quote)
                  s[index] = '"'
              else:
                  in_single_quotes = toggle(in_single_quotes)
          if ch == '"':
              if in_ansi_c_quote:
                  s[index] = '\\"'
              else:
                  in_double_quotes = toggle(in_double_quotes)
          if ch == '$' and not in_single_quotes and not in_double_quotes:
              maybe_ansi_c_quote = True
          if maybe_ansi_c_quote and ch == '\'':
              maybe_ansi_c_quote = False
              in_ansi_c_quote = True
              s[index] = '"'
              to_del.append(index-1)
          if in_ansi_c_quote and ch in '\a\b\f\n\r\t\v':
              s[index] = repr(ch)[1:-1]
      to_del.reverse()
      for i in to_del:
          del s[i]
      return ''.join(s)