Testing obsolete interfaces

[Aaron Bentley]

Robert Collins wrote:
> In the case where we are removing functionality completely - deprecating
> something we're going to stop supporting, then I think there is a still
> a strong argument for separating the deprecated api and the tested
> functionality.

So what would you do about revision.get_intervening_revisions (you know, 
if it was deprecated for zero_nine, not zero_eight) ?

Aaron