[PATCH] revset: change ancestor to accept 0 or more arguments (issue3750)

[Siddharth Agarwal]

On 02/01/2013 04:07 PM, Paul Cavallaro wrote:
> # HG changeset patch
> # User Paul Cavallaro <ptc at fb.com>
> # Date 1359404361 28800
> # Branch stable
> # Node ID 014dd5ef89d8504ee662ea508f32afaeba3f2f21
> # Parent  692cbda1eb50fe30c70792cb1e9380b28769467c
> revset: change ancestor to accept 0 or more arguments (issue3750)

Is the GCA operation commutative and associative, particularly when 
multiple revs are possible GCA candidates? If not, a left fold (which is 
what was picked here) and right fold could mean different things.