Fix a REPL test, under Windows

Author: dwijnand

compiler/test/dotty/tools/repl/ReplCompilerTests.scala

@@ -209,8 +209,7 @@ class ReplCompilerTests extends ReplTest:
     }.andThen {
       assertEquals(
         """// defined trait Nat
-          |// defined object Nat
-          |""".stripMargin, storedOutput())
+          |// defined object Nat""".stripMargin, storedOutput().trim)
       run("Nat.fromInt(2)")
     }.andThen {
       assertEquals("val res0: Nat.Succ[Nat.Succ[Nat.Zero.type]] = Succ(Succ(Zero))", storedOutput().trim)