[PATCH 1 of 5 V3] rust: pure Rust lazyancestors iterator

[Yuya Nishihara]

On Sat, 13 Oct 2018 15:59:39 +0200, Georges Racinet wrote:
> # HG changeset patch
> # User Georges Racinet <gracinet at anybox.fr>
> # Date 1538060596 -7200
> #      Thu Sep 27 17:03:16 2018 +0200
> # Node ID 41b32e06629466bbe671c6ebfc1c5a4133c8af99
> # Parent  38ac525b44c93fcadb3680d4ded56f1e5a0029b2
> # EXP-Topic rustancestors-contains
> rust: pure Rust lazyancestors iterator

Queued the first 3, thanks.

The first Rust hg reimplementation landed. \o/