Add data modifier to a class quickfix #KT-18220 Fixed

idea/testData/quickfix/addDataModifier/test4.kt

@@ -0,0 +1,9 @@
+// "Make 'Foo' data class" "true"
+// WITH_RUNTIME
+class Foo(val bar: String, var baz: Int)
+
+fun test() {
+    val list = listOf(Foo("A", 1))
+    for ((foo, bar) in list<caret>) {
+    }
+}