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

idea/testData/quickfix/createFromUsage/createClass/annotationEntry/singleArgAnnotation.kt

@@ -0,0 +1,5 @@
+// "Create annotation 'foo'" "true"
+
+[<caret>foo(1)] fun test() {
+
+}