anchor.diff:  ----
   
   == Usage
  -----
   Usage: ROT13 [OPTION...] [FILE...]
   
   ROT13 -- Rotate by 13 places encryption
  
positive.code: ----
  
  == License
  ----
  Copyright (c) 2015 Star Poon
  
  This program is free software: you can redistribute it and/or modify
  
negative.code: 
  Mandatory or optional arguments to long options are also mandatory or optional
  for any corresponding short options.
  
  TIP: If no FILE provided, program will read from standard input.
  
  == Example
  