Diagrams.assert calls Future two times

[antarcticer]

One line assert from org.scalatest.diagrams.Diagrams calls Future two times:

import org.scalatest.diagrams.Diagrams
import org.scalatest.funsuite.AnyFunSuite
import scala.concurrent.ExecutionContext.Implicits.global
import scala.concurrent.duration.{Duration, SECONDS}
import scala.concurrent.{Await, Future}

class ReproduceTest extends AnyFunSuite with Diagrams {
  test("reproduce") {
    assert(Await.result(Future { println("in future"); 42 }, Duration(1, SECONDS)) == 42)
  }
}

result:

in future
in future

Two line assert is ok:

    assert(Await.result(Future { println("in future"); 42 },
      Duration(1, SECONDS)) == 42)

result:

in future

Checked versions:

• scalatest 3.2.12, scala 2.13.7
• scalatest 3.2.14, scala 3.2.1

[cheeseng]

@antarcticer Fyi I submitted the following PR for this:

#2219

If it is approved by @bvenners , we can include this in the upcoming 3.2.15 release.