Uwe Reimann

How about using `FormDataDecoder[A]` instead of those Vars? Have a look at my real quick proof of concept: ```scala object MyMatrixVar { def unapply(str: String): Option[(String, Map[String, Chain[String]])] = str.split(';')...

> TestControl.executeEmbed I added some tests, atm without `TestControl.executeEmbed`. `test("mergePreferred prefers")` actually cheats by delaying the non-preferred stream. Without the delay, when fetching the first element, a race will be...

I adjusted the test of the behaviour of `mergePreferred` to work without any tweaks of timing (i.e. no `delay`, `metered` or `TestControl.executeEmbed`, etc.). It tolerates some (currently 2%) of the...