added info about smart casts to diagnostic tests

compiler/testData/diagnostics/tests/dataFlow/local/kt2835.kt

@@ -2,7 +2,7 @@ open class X(val s: String)
 
 fun f(a: String?) {
     if (a != null) {
-        object : X(a) { // Type mismatch: inferred type is jet.String? but jet.String was expected
+        object : X(<!DEBUG_INFO_AUTOCAST!>a<!>) { // Type mismatch: inferred type is jet.String? but jet.String was expected
         }
     }
 }