Add ERRORs check to AbstractOutOfBlockModificationTest

idea/testData/codeInsight/outOfBlock/InLambdaFunction.kt

@@ -1,9 +1,16 @@
 // OUT_OF_CODE_BLOCK: FALSE
+// TYPE: t
+
+fun CharSequence.repeat(n: Int): String {
+    val sb = StringBuilder(n * length)
+    for (i in 1..n) {
+        sb.append(this)
+    }
+    return sb.toString()
+}
 
 fun twice(s: String): String {
     val repeatFun: String.(Int) -> String = { t -> this.repeat(<caret>) }
 
     return repeatFun(s, 2)
 }
-
-// TYPE: t