Groupped tests by folders

idea/testData/intentions/loopToCallChain/flatMap/simple.kt

@@ -0,0 +1,11 @@
+// WITH_RUNTIME
+// INTENTION_TEXT: "Replace with 'flatMap{}.firstOrNull{}'"
+// INTENTION_TEXT_2: "Replace with 'asSequence().flatMap{}.firstOrNull{}'"
+fun foo(list: List<String>): String? {
+    <caret>for (s in list) {
+        for (line in s.lines()) {
+            if (line.isNotBlank()) return line
+        }
+    }
+    return null
+}