anchor.diff:  
   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
  
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: ----
  
  == Usage
  Usage: ROT13 [OPTION...] [FILE...]
  
  ROT13 -- Rotate by 13 places encryption
  