Update README.md

Author: paweljasinski

README.md

@@ -26,7 +26,9 @@ Every minute a small mouse movement and shift key press are generated by a devic
 ## Password Update
 In order to record password, you have to get lazy-password in normal operation mode.
 
-Prepare a file containing <password_idx>:<password>\0
+Prepare a file containing: ```<password_idx>:<password>\n\0```
+
+         
 For example p0.txt:
 
 ```