Big change in quickfix tests: no stupid test data format with "before" and "after" file prefixes

idea/testData/quickfix/when/noElseInWhenWithBranches.kt.after

@@ -0,0 +1,10 @@
+// "Add else branch" "true"
+fun test() {
+    val a = 12
+    val x = when (a) {
+        in 0..11 -> { /* some code */ }
+        12, 13, 14 -> { /* some code */ }
+        else -> {<caret>
+        }
+    }
+}