old_contents: """
                 #   # ####  ##### #   # ##### #   # #   #
                 #  #  #   # #     ## ##  #  # #  ## #   #
                 ###   ####  ####  # # #  #  # # # # #####
                 #  #  #     #     #   #  #  # ##  # #   #
                 #   # #     ##### #   # #   # #   # #   #
  
                     Kremlin Magical Everything System
                 Glasnost Image Board and Boredom Inhibitor
  
  """
  import os
  
  from PIL import Image
  
  def mkthumb(fp, h=128, w=128):
      """docstring for mkthumb"""
  
      size = (h, w)
      f, ext = os.path.splitext(fp)
  
      im = Image.open(fp)
      im.thumbnail(size, Image.ANTIALIAS)
      im.save(f + ".thumbnail" + ext)
  
new_contents: """
                 #   # ####  ##### #   # ##### #   # #   #
                 #  #  #   # #     ## ##  #  # #  ## #   #
                 ###   ####  ####  # # #  #  # # # # #####
                 #  #  #     #     #   #  #  # ##  # #   #
                 #   # #     ##### #   # #   # #   # #   #
  
                     Kremlin Magical Everything System
                 Glasnost Image Board and Boredom Inhibitor
  
  """
  import os
  
  from PIL import Image
  
  def mkthumb(fp, h=128, w=128):
      """docstring for mkthumb"""
  
      size = (h, w)
      f, ext = os.path.splitext(fp)
  
      im = Image.open(fp)
      im.thumbnail(size, Image.ANTIALIAS)
      im.save('.thumbnail'.join([f, ext]))
  
subject: Use better string concatenation in mkthumb()