Fix tests

Author: odersky

tests/neg/i4934.scala

@@ -1,10 +1,11 @@
-object Foo {
-  val a = ""); // error: end of statement expected
-}
 // From #5824:
 object Main {
   def main(args: Array[String]): Unit = {
     val foo = 123 ""; // error: end of statement expected
     println(foo)
   }
-}
+}
+
+object Foo {
+  val a = ""); // error: `}` expected but `)` found
+} // error: eof expected

tests/neg/parser-stability-4.scala

@@ -1,3 +1,2 @@
 class x0{
       def x0: x0 = (x0 => x0) => x0)  // error // error
-// error