Fix writing to a file only when the option is set.

src/cipher_analytical_machine/cli.clj

@@ -147,7 +147,8 @@
 (defn show-and-save-output
   "Print and save the output to a file if needed"
   [output options]
-  (save-output output options)
+  (when (contains? options :output-file)
+    (save-output output options))
   (println output))
 
 (defn cracking-actions