Tue Oct 19 17:09:02 2021

rot13_test
  Python version: 3.6.9
  Test rot13().

ch_to_rot13_test
  Python version: 3.6.9
  ch_to_rot13 "encodes" characters using ROT13
  (and digits using ROT5).
  A second application of the function returns the
  original character.

            CH  : ABCDEFGHIJKLMNOPQRSTUVWXYZ
      ROT13(CH) : NOPQRSTUVWXYZABCDEFGHIJKLM
ROT13(ROT13(CH)): ABCDEFGHIJKLMNOPQRSTUVWXYZ

            CH  : ch_to_rot13 "encodes" characters using ROT13
      ROT13(CH) : pu_gb_ebg68 "rapbqrf" punenpgref hfvat EBG68
ROT13(ROT13(CH)): ch_to_rot13 "encodes" characters using ROT13

ch_to_rot13_test:
  Normal end of execution.

s_quote_test
  Python version: 3.6.9
  s_quote quotes a string S1 with a mark MARK.

  ----S1----  ---MARK---  ----S2----

  Hi, Bob!    "           "Hi, Bob!"
  De          Loop        LoopDeLoop

s_quote_test
  Normal end of execution.

s_to_rot13_test
  Python version: 3.6.9
  s_to_rot13 applies the ROT13 cipher to a string.

  S2 = s_to_rot13 ( S1 ).

  -------------------S1-------------------  -------------------S2-------------------

  "abcdefghijklmnopqrstuvwxyz"              "nopqrstuvwxyzabcdefghijklm"            
  "Cher"                                    "Pure"                                  
  "James Thurston Howell III"               "Wnzrf Guhefgba Ubjryy VVV"             
  "The bill is $1,205,837.49 so pay now!"   "Gur ovyy vf $6,750,382.94 fb cnl abj!" 

  S2 = s_to_rot13 ( S1 ).
  S3 = s_to_rot13 ( S2 ).

  -------------------S1-------------------  -------------------S3-------------------

  "abcdefghijklmnopqrstuvwxyz"              "abcdefghijklmnopqrstuvwxyz"            
  "Cher"                                    "Cher"                                  
  "James Thurston Howell III"               "James Thurston Howell III"             
  "The bill is $1,205,837.49 so pay now!"   "The bill is $1,205,837.49 so pay now!" 

s_to_rot13_test:
  Normal end of execution.

rot13_test:
  Normal end of execution.
Tue Oct 19 17:09:02 2021