Choice Label + Newline + Condition doesn't work

v1.2.0 made it possible to add a linebreak after the choice label, but that seems to break choice conditions (I think).

## Current Output
```ink
* (label)
{true} choice text
```
outputs
```
1: true choice text
```

## Expected Output
I think it should be
```
1: choice text
```
i.e. the same as if I'd written
```ink
* (label) {true} choice text
```

NB. Linebreaks seem to work between conditions, so

```ink
* (label) {true}
{true} choice text
```
gives the expected output above. I guess that's kind of a workaround, but it would be nice if that wasn't necessary.