"nothing" doesn't quit on first input

During the application, if the user enters `nothing` then it usually ends the program. However, there is a bug so that if they enter `nothing` on the very first input, it does the following:

```
What are you listening to?
nothing
Great! Let's listen to more
What's next?
```

And prompts the user to enter again. Instead, **any time** the user enters `nothing`, the program should terminate without any more interaction.

Locate the application’s input loop and trace how the first response is handled when it is `nothing`. Run the program with `nothing` as the first input, then verify that it exits immediately without displaying another prompt or requesting further input.

Written by the indexing model from the issue text.