Groupped tests by folders

idea/testData/intentions/loopToCallChain/toCollection/addToCollection.kt

@@ -0,0 +1,8 @@
+// WITH_RUNTIME
+// INTENTION_TEXT: "Replace with '+='"
+// IS_APPLICABLE_2: false
+fun foo(list: List<String>, target: MutableList<String>) {
+    <caret>for (s in list) {
+        target.add(s)
+    }
+}