Old backing field with dollar is now forbidden

compiler/testData/codegen/box/staticFields/incInClassObject.kt

@@ -20,7 +20,7 @@ class A {
         fun test2() : Int {
             r2++
             ++r2
-            return $r2
+            return r2
         }
 
         var r3: Int = 1;
@@ -32,7 +32,7 @@ class A {
         fun test3() : Int {
             r3++
             ++r3
-            return $r3
+            return r3
         }
 
         var r4: Int = 1;
@@ -49,7 +49,7 @@ class A {
             r4++
             holder += ":"
             ++r4
-            return $r4
+            return r4
         }
     }
 }
@@ -60,7 +60,7 @@ fun box() : String {
 
     val p2 = A.test2()
     var holderValue = A.holder
-    if (p2 != 3 || holderValue != "getR2getR2getR2") return "fail 2:  $p2 ${holderValue}"
+    if (p2 != 3 || holderValue != "getR2getR2getR2getR2") return "fail 2:  $p2 ${holderValue}"
 
     A.holder = ""
     val p3 = A.test3()
@@ -68,7 +68,7 @@ fun box() : String {
 
     A.holder = ""
     val p4 = A.test4()
-    if (p4 != 3 || A.holder != "getR4setR4:getR4setR4getR4") return "fail 4:  $p4 ${A.holder}"
+    if (p4 != 3 || A.holder != "getR4setR4:getR4setR4getR4getR4") return "fail 4:  $p4 ${A.holder}"
 
     return "OK"
 }