A quick gist that shows a KtLint formatting issue with enum classes.

AfterFormat.kt

enum class DayEnum(
    val index: Int,
    val dayName: String
) {
    SUNDAY(
    index = 0,
    dayName = "Sunday"
),
    MONDAY(
    index = 1,
    dayName = "Monday"
),
    TUESDAY(
    index = 2,
    dayName = "Tuesday"
),
    WEDNESDAY(
    index = 3,
    dayName = "Wednesday"
),
    THURSDAY(
    index = 4,
    dayName = "Thursday"
),
    FRIDAY(
    index = 5,
    dayName = "Friday"
),
    SATURDAY(
    index = 6,
    dayName = "Saturday"
);

    fun isWeekend(): Boolean {
        return this in listOf(SUNDAY, SATURDAY)
    }
}

BeforeFormat.kt

enum class DayEnum(
    val index: Int,
    val dayName: String
) {
    SUNDAY(
        index = 0,
        dayName = "Sunday"
    ),
    MONDAY(
        index = 1,
        dayName = "Monday"
    ),
    TUESDAY(
        index = 2,
        dayName = "Tuesday"
    ),
    WEDNESDAY(
        index = 3,
        dayName = "Wednesday"
    ),
    THURSDAY(
        index = 4,
        dayName = "Thursday"
    ),
    FRIDAY(
        index = 5,
        dayName = "Friday"
    ),
    SATURDAY(
        index = 6,
        dayName = "Saturday"
    );

    fun isWeekend(): Boolean {
        return this in listOf(SUNDAY, SATURDAY)
    }
}