Did it ever happen to you to spend a decent amount of time working on a piece of code in the console, making it work and then closing the shell thinking to yourself: Oh cool, I found a solution! 5 minutes later you try to recreate what you did and something is not working? You bang your head against the wall wishing that time travel was possible so you could go back in time and take just a sneak peak at what you wrote. Time travel is not possible. At the moment. But even without it, you can ‘recover...