issue with histedit --abort when using evolve + 3.5

[Pierre-Yves David]

We just spotted a problematic change in 3.5 regarding `hg histedit --abort`.

The abort mechanism will create obsolescence marker instead of just 
removing the result of the histedit so far. Theses obsolescence markers 
would likely get in your way in a future histedit run.

The faultly change is being backed out, and I'll keep you posted.

In the mean time avoid either upgrading to 3.5 or using histedit --abort

-- 
Pierre-Yves David