As you see, the docs are not wrapping, which makes them pretty much useless. I have tried the popup mode, it makes no difference.
I am using IntelliJ Ultimate 2018.1.
PS: I found this fixed issue https://youtrack.jetbrains.com/issue/IDEA-169414 , but it seems unrelated?
Update 1: I just checked with Kotlin (and disabled Cursive for good measure), some docs are still not wrapped, though some are:
