rust: changed Graph.parents to return [Revision; 2]...
rust: changed Graph.parents to return [Revision; 2]
This will allow for simple iteration on parent revisions,
such as:
for parent in graph.parents(rev)?.iter().cloned()
This seems to be a zero overhead abstraction once built in
release mode.
Differential Revision:
https://phab.mercurial-scm.org/D5415
