Broken guarantee in Instant.periodUntil

[dkhalanskyjb]

Quoting https://kotlinlang.org/api/kotlinx-datetime/kotlinx-datetime/kotlinx.datetime/period-until.html:

All components of the DateTimePeriod returned are [...] positive or zero if this instant is earlier than the other.

val tz = TimeZone.of("Europe/Berlin")
println(
    LocalDateTime(2025, 3, 29, 2, 30).toInstant(tz).periodUntil(
    LocalDateTime(2025, 3, 30, 3, 10).toInstant(tz), tz))
// P1DT-20M

Runnable: https://pl.kotl.in/LedZ6Njqf