2.9.2: * Added SourceUndoManager, SourceCompletionWords and updated SourceBuffer. (Krzesimir Nowak) * Added vfuncs to SourceCompletionProposal and SourceCompletionProvider. (Krzesimir Nowak) * Documentation: Documented SourceUndoManager, SourceCompletionWords and new methods in SourceBuffer. (Krzesimir Nowak)