Versioned files in Pharo

Nice project from Norbert to provide versioned files:  

'test.text' asVersionedFile writeStreamDo: [:s | s nextPutAll: 'HelloWorld' ]

will create files:

•      test.txt.1 
•      test.txt.2 
•      ... 

 anytime you run it. And a test.txt.seq with the current number. Useful.