Puzzler candidate: 'Size Matters'

I get (2.11.0-RC3 REPL):
```
scala>   println(howManyItems(lunchbox, "apple"))
4

scala>   println(howManyItemsRefac(lunchbox, "apple"))
47
```
`Set(orange juice, sandwich, chocolate bar)apple` is 47 characters long. What are you seeing?