KDoc formatting

I just noticed the KDoc in DeterministicTestDataCreator as a bit strangely indented. ktlintFormat and the IDEA formatter don't seem to care, but they both allow us to format multi-line @param descriptions on the second line as we like. I've looked through the kotlin codebase to find examples on how the do it and found at least this. In the same file there's also an example of different style, so apparently they didn't agree on or enforce something either.