Fix printing return

Author: nicolasstucki

library/src/scala/tasty/util/ShowSourceCode.scala

@@ -389,7 +389,7 @@ class ShowSourceCode[T <: Tasty with Singleton](tasty0: T) extends Show[T](tasty
         }
 
       case Term.Return(expr) =>
-        this += "}"
+        this += "return "
         printTree(expr)
 
       case Term.Repeated(elems) =>

tests/pos/t3869.decompiled

@@ -0,0 +1,7 @@
+/** Decompiled from out/posTestFromTasty/pos/t3869/Test.class */
+object Test {
+  def f: scala.Unit = try return () finally while (true) ()
+  def main(args: scala.Array[scala.Predef.String]): scala.Unit = {
+    Test.f
+  }
+}