NicolasPetton/amber — pull request #327 by herby (2013-02-11 17:05:41+00:00)
Title: Mystery of class '[object Object]' resolved.

`UndefinedObject >> subclass:...` sent the symbol object
to the `ClassBuilder`, unlike `Class` which `asString`-ed it.

So `nil subclass: #Object` misbehaved.