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

[Bryan O'Sullivan]

On Wed, Feb 6, 2013 at 6:51 PM, Siddharth Agarwal <sid0 at fb.com> wrote:

> Is the GCA operation commutative and associative, particularly when
> multiple revs are possible GCA candidates?
>

In principle yes, in practice we get that wrong today (and this is no worse
than the existing code).

When we get around to replacing the ancestor code with the more general GCA
code, I'll fix this.
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