commit: move sorting of added and removed files list to lower level localrepo.commitctx() has lists of all changed files, as well as lists of added and removed files. The list of all files is unsorted and changelog.add() will sort it. Let's also sort the lists of added and removed files at a lower level (manifestrevlog.add()) for consistency. It also seems safer to do it there, just before we write them to the store. That way other callers won't be able to create invalid commits (or whatever the consequence is) by passing in unsorted lists. Also, alternative storages may not care that the lists are sorted. I don't think this will be a performance problem (someone should have fixed the sorting in changelog.add() if it were). Differential Revision: https://phab.mercurial-scm.org/D6390