anchor.diff:  ----
   
   == Usage
  -----
   Usage: ROT13 [OPTION...] [FILE...]
   
   ROT13 -- Rotate by 13 places encryption
  
positive.code: 
  You should have received a copy of the GNU General Public License
  along with this program.  If not, see <http://www.gnu.org/licenses/>.
  ----
  
  == Bugs & Feedback
  Report bugs to Star Poon <oneonestar@gmail.com>.
  
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
  