Update tests/run/i7788.scala

Co-Authored-By: Jamie Thompson <bishbashboshjt@gmail.com>

Author: odersky

tests/run/i7788.scala

@@ -5,10 +5,10 @@ given Show[String] = x => x
 given Show[Int] = _.toString
 
 given showEither[A,B]: (sA: Show[A]) => Show[B] => Show[Either[A,B]] =
-  _.fold(a => s"Left(${summon[Show[A]].show(a)})", _ => "Right(Ignored value of B)")
+  _.fold(a => s"Left(${summon[Show[A]].show(a)})", b => s"Right(${summon[Show[B]].show(b)})")
 given [A,B]: (sA: Show[A]) => (sB: Show[B]) => Show[(A,B)] = (a,b) => s"(${sA.show(a)}), ${sB.show(b)})"
 
 @main def ShowDemo =
   println(summon[Show[(Int, String)]].show(0 -> "hello"))
   println(summon[Show[Either[Int, String]]].show(Left(-1)))
-  println(summon[Show[Either[Int, String]]].show(Right("success message")))
+  println(summon[Show[Either[Int, String]]].show(Right("success message")))