[test] Missing after-X files used to be an implicit 'just ignore the content' signal; now you need an explicit directive to allow this behaviour.

[configuration] added tests for @Accessors configuration key implementations.

test/transform/resource/before/FlagUsages.java

@@ -1,3 +1,4 @@
+//skip compare content
 //CONF: lombok.Getter.flagUsage = WARNING
 //CONF: lombok.experimental.flagUsage = ERROR
 public class FlagUsages {