Pierre-Yves David <pierre-yves.david@octobus.net> [Wed, 16 Dec 2020 10:01:34 +0100] rev 46577
copies-rust: extract the processing of a single copy information
This will make it easy to process copy from both p1 and p2 in the same
`add_from_changes` call.
Differential Revision: https://phab.mercurial-scm.org/D9648
Pierre-Yves David <pierre-yves.david@octobus.net> [Wed, 16 Dec 2020 09:42:04 +0100] rev 46576
copies-rust: use matching to select the final copies information
This is a bit more idiomatic and this prepare a future refactoring where
InternalCopies from both parent would be updated at the same time.
Differential Revision: https://phab.mercurial-scm.org/D9647