Martin von Zweigbergk <martinvonz@google.com> [Tue, 12 Jan 2021 08:07:59 -0800] rev 46291
shelve: replace repo instance in Shelf class by vfs instance
I'd like to be able to teach the `Shelf` class to read shelves from
`.hg/shelve-backup/` in addition to `.hg/shelved/`. That means that
we'll have to pass in a vfs instead of the repo, so this patch does
that preparation.
Differential Revision: https://phab.mercurial-scm.org/D9738