[Pharo-project] [ANN] 10322 color preference removal

Remove the #colorWhenPrettyPrinting preference. As a consequence, some code formatting methods are refactored (The major remodelling is the Compiler>>#format:in:notifying:decorated: removal, replaced by Compiler>>#format:in:notifying:) http://code.google.com/p/pharo/issues/detail?id=824 Stef