Fix failing tests

Author: szymon-rd

tests/init/warn/final-fields.scala

@@ -28,7 +28,7 @@ class Test1 extends U {
 
 }
 
-object Test extends T {
+class Test extends T {
  override final val f1 = /*super.f1*/ 1 + f2  // warn
  override final val f2 = 2                    // warn
  override final val f3 = {println(3); 3}      // warn

tests/init/warn/i15883.scala

@@ -1,5 +1,5 @@
 class Outer:
-  val flags = new Flags // error
+  val flags = new Flags // warn
 
   class Flags {
     class Inner {
@@ -9,14 +9,15 @@ class Outer:
     new flags.Inner
 
     val a = this.b + 3
-    val b = 5 // error
+    val b = 5 // warn
   }
 
   class Flags2 {
     class Inner {
       println(b)
     }
 
+
     lazy val a = 3
     val b = 5
   }

tests/init/warn/inner9.scala

@@ -1,6 +1,6 @@
 import scala.language.implicitConversions
 
-object Test {
+class Test {
   val num1: LazyList[Int] = 1 #:: num1.map(_ + 1)                        // warn
   val num2: LazyList[Int] = 1 #:: num2.iterator.map(_ + 1).to(LazyList)  // warn