old_contents: 
  def cleanBin(s, fixspacing=False):
      """
          Cleans binary data to make it safe to display. If fixspacing is True,
          tabs, newlines and so forth will be maintained, if not, they will be
          replaced with a placeholder.
      """
      parts = []
      for i in s:
          o = ord(i)
          if (o > 31 and o < 127):
              parts.append(i)
          elif i in "\n\r\t" and not fixspacing:
              parts.append(i)
          else:
              parts.append(".")
      return "".join(parts)
  
  
  def hexdump(s):
      """
          Returns a set of tuples:
              (offset, hex, str)
      """
      parts = []
      for i in range(0, len(s), 16):
          o = "%.10x"%i
          part = s[i:i+16]
          x = " ".join("%.2x"%ord(i) for i in part)
          if len(part) < 16:
              x += " "
              x += " ".join("  " for i in range(16 - len(part)))
          parts.append(
              (o, x, cleanBin(part, True))
          )
      return parts
  
new_contents: 
  def cleanBin(s, fixspacing=False):
      """
          Cleans binary data to make it safe to display. If fixspacing is True,
          tabs, newlines and so forth will be maintained, if not, they will be
          replaced with a placeholder.
      """
      parts = []
      for i in s:
          o = ord(i)
          if (o > 31 and o < 127):
              parts.append(i)
          elif i in "\n\t" and not fixspacing:
              parts.append(i)
          else:
              parts.append(".")
      return "".join(parts)
  
  
  def hexdump(s):
      """
          Returns a set of tuples:
              (offset, hex, str)
      """
      parts = []
      for i in range(0, len(s), 16):
          o = "%.10x"%i
          part = s[i:i+16]
          x = " ".join("%.2x"%ord(i) for i in part)
          if len(part) < 16:
              x += " "
              x += " ".join("  " for i in range(16 - len(part)))
          parts.append(
              (o, x, cleanBin(part, True))
          )
      return parts
  
subject: Make cleanBin escape carriage returns.