> Of course, you can also do this by making copies manually, but that gets complicated if the program consists of more than file. ...and manual copies don't of

> Of course, you can also do this by making copies manually, but that gets complicated if the program consists of more than file. ...and manual copies don't offer you the great automations that git provides you for free, like being able to tell when exactly each line has been changed last time (so you can check the whole context of how and why that change was made) or perform a binary search of a revision that introduced a bug. Even when working alone, these tools are invaluable.