Completed exercise and added questions into intro file.

When you are inputing, you type `Enter` key, which adds a newline to the end. `#strip` strips that newline off.

If you don't do `#strip`, you'll get output like this:

```
Well that's a mighty purty name, joe
! Have a nice day!
```

^^ See how there's a line break before the exclamation mark, which is definitely not what we want?

Separately from all that, we're adding a newline to space the generated output line an extra line vertically away from the original prompt line.