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

idea/testData/quickfix/createFromUsage/createVariable/parameter/inAccessorInClassObject.kt

@@ -0,0 +1,13 @@
+// "Create parameter 'foo'" "false"
+// ACTION: Convert to expression body
+// ACTION: Create local variable 'foo'
+// ACTION: Create property 'foo'
+// ERROR: Unresolved reference: foo
+
+class A {
+    companion object {
+        val test: Int get() {
+            return <caret>foo
+        }
+    }
+}