Foldable[Stream].foldRight isn't stack-safe

[ceedubs]

The following code results in a stack overflow, but it should return false, because this is basically how forall is implemented in Foldable.

import cats._, cats.implicits._

val s: Stream[Boolean] = Stream.fill(10000)(true) ++ Stream.continually(false)

Foldable[Stream].foldRight(s, Eval.now(true))((a,b) => if (a) b else Eval.now(false)).value

Notably, Foldable[Stream].forall is actually stack-safe, but that's because it is overridden to use Stream.forall.

I noticed this when looking at #824.

[ceedubs]

Actually, I can't reproduce this, and it looks like we already have a test for this in FoldableStreamCheck. Maybe I was using .foldRight on a Stream instead of using the Foldable instance? I'm not sure. I'm going to go ahead and close this out.