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

idea/testData/quickfix/createFromUsage/createFunction/call/extensionFunOnTrait.kt.after

@@ -0,0 +1,11 @@
+// "Create extension function 'foo'" "true"
+
+trait T
+
+fun test(t: T) {
+    val b: Boolean = t.foo("1", 2)
+}
+
+fun T.foo(s: String, i: Int): Boolean {
+    throw UnsupportedOperationException("not implemented") //To change body of created functions use File | Settings | File Templates.
+}