Improve MultipleClassFileToPsr4ClassesRector output

[JanMikes]

Hi, here is the log:

▶ docker run -v $(pwd):/project rector/rector process /project/libs/klarka/Analytics/OrderData.php --config /project/rector.yaml -vvv          
Rector No version set (parsed as 1.0.0)@
Config file: /project/rector.yaml

/project/libs/klarka/Analytics/OrderData.php
/project/libs/klarka/Analytics/OrderData.php
/project/libs/klarka/Analytics/OrderData.php


 [OK] Rector is done! 0 changed files     

This statement: [OK] Rector is done! 0 changed files is not correct and can be a bit misleading. 2 files in total were changed. The original one and newly created file with new class.