[Python-3000] More PEP 3101 changes incoming

[Talin]

James Y Knight wrote:
> I've been skimming a lot of the discussion about how to special case  
> various bits and pieces of formatting, but it really seems to me as  
> if this is really just asking for the use of a generic function. I'm  
> not sure how exactly one spells the requirement that the first  
> argument be equal to a certain object (e.g. 'r') rather than a  
> subtype of it, so I'll just gloss over that issue.

The plan is to eventually use generic functions once we actually have an 
implementation of them. That probably won't happen in Alpha 1.

-- Talin