Rewrote test for clarity

Author: TonioGela

tests/shared/src/test/scala/cats/tests/ParallelSuite.scala

@@ -416,8 +416,8 @@ class ParallelSuite
 
   test("ParMapN over f should be consistent with parFlatMapN over f lifted in Kleisli") {
     forAll { (as: List[Int], bs: List[Int]) =>
-      val f: (Int, Int) => Int = _ + _
-      val mf: (Int, Int) => List[Int] = Function.untupled(Kleisli.fromFunction[List, (Int, Int)](f.tupled).run)
+      val f: (Int, Int) => Int = (a, b) => a + b
+      val mf: (Int, Int) => List[Int] = (a, b) => List(a + b)
       assert((as, bs).parMapN(f) == (as, bs).parFlatMapN(mf))
     }
   }