print message with all characters

when there's a period at the end of the string to be decrypted, it decrypts as \u{17}, a terminal character.

Author: jacksonwalters

.gitignore

@@ -25,4 +25,4 @@ Cargo.lock
 # Ignore the key files if they are generated
 public.key
 secret.key
-ciphertext.txt
+ciphertext.txt