[docs] [issue9538] Replace confusing pseudoname 'object' in special methods section.

Terry J. Reedy <tjreedy@udel.edu> added the comment: I filed this because I just reread the __getattr(ibute)__ entries to respond to #8722 and found myself again stumbling over the 'object' confusion. ---------- _______________________________________ Python tracker <report@bugs.python.org> <http://bugs.python.org/issue9538> _______________________________________