"Use withIndex()" intention&inspection

idea/testData/intentions/useWithIndex/alreadyWithIndex.kt

@@ -0,0 +1,11 @@
+// WITH_RUNTIME
+// IS_APPLICABLE: false
+fun foo(list: List<String>): Int? {
+    var index = 0
+    <caret>for ((i, s) in list.withIndex()) {
+        val x = s.length * index * i
+        index++
+        if (x > 0) return x
+    }
+    return null
+}