Kotlin DSL formatting looks messy

## Actual Behavior
```
foo =
fooDsl {
bar +=
barDsl {
baz =
bazDsl {
bal = 1
}
}
}
```

## Expected Behavior
```
foo = fooDsl {
bar += barDsl {
baz = bazDsl {
bal = 1
}
}
}
```

Reproduce the issue with the Kotlin DSL snippet in the report and compare the actual output with the expected formatting. Trace the formatter path that handles nested DSL assignments and verify that the output matches the expected indentation and inline assignments for this example.

Written by the indexing model from the issue text.