I’m attempting to write a Doctest for IslandsEngine.Guesses, recreating the iex session from page 17 of the latest book release.

I’ve figured out how to represent an empty MapSet in a doctest as:

```
%IslandsEngine.Guesses{hits: %MapSet{}, misses: %MapSet{}}
```

However, I cannot figure out how to represent a MapSet that contains an IslandsEngine.Coordinate.

From the book I’m attempting to convert the example MapSet (which doctest does not like):

```
%IslandsEngine.Guesses{
hits: #MapSet<[%IslandsEngine.Coordinate{col: 1, row: 1}]>,
misses: #MapSet<[]>
}
```

To the following MapSet:

```
%IslandsEngine.Guesses{
hits: %MapSet{%IslandsEngine.Coordinate{col: 1, row: 1}},
misses: %MapSet{}
}
```

Doctest accepts the empty MapSet (misses: %MapSet{}) portion, but doesn’t like hits: that contains the Coordinate, reporting a: ‘syntax error before: ‘}’ ??

Any ideas anyone?

Dan