UnstableChanges

Summary

  1. fixes  #2769 (details)
  2. fix failing test (details)
The file was addedsrc/Slot-Tests/WriteOnceSlotTest.class.st
The file was addedsrc/Slot-Examples/WriteOnceSlot.class.st
The file was addedsrc/Slot-Tests/AClassUsingWriteOnceSlot.class.st
The file was modifiedsrc/Slot-Tests/AClassUsingWriteOnceSlot.class.st (diff)
The file was modifiedsrc/Slot-Examples/WriteOnceSlot.class.st (diff)