MultilineIfElseRule inserts unnecessary empty lines

[romtsn]

This is most likely a regression from #727

Expected Behavior

I expect this code snippet

val listenerDisposableHandle = coroutineContext[Job]!!.invokeOnCompletion(onCancelling = true) { cancelCause ->
    val parentJob = ref.state

    if (cancelCause is CancellationException)
        parentJob.cancel(cause = cancelCause)
    else
        parentJob.cancel()
}

to be reformatted to

val listenerDisposableHandle = coroutineContext[Job]!!.invokeOnCompletion(onCancelling = true) { cancelCause ->
    val parentJob = ref.state

    if (cancelCause is CancellationException) {
        parentJob.cancel(cause = cancelCause)
    } else {
        parentJob.cancel()
    }
}

Observed Behavior

However, this gets reformatted to

val listenerDisposableHandle = coroutineContext[Job]!!.invokeOnCompletion(onCancelling = true) { cancelCause ->
    val parentJob = ref.state

    if (cancelCause is CancellationException) {
        parentJob.cancel(cause = cancelCause)

    } else {
        parentJob.cancel()

    }
}

with unnecessary empty lines before rbraces

Steps to Reproduce

Run ktlint --format on the snippet from the expected behavior
The issue was discovered in this pull request touchlab/KaMPKit#115

Your Environment

• Version of ktlint used: 0.37.2
• Name and version (or code for custom task) of integration used (Gradle plugin, Maven plugin, command line, custom Gradle task): ktlint-gradle plugin 9.2.1
• Version of Gradle used (if applicable): 5.6.4
• Operating System and version: MacOS Catalina version 10.15.5