D1679: rebase: fix for hgsubversion

[phillco (Phil Cohen)]

phillco added a comment.


  A better way might just be to use `None` for `self.wtcx` when rebasing on disk, which will cause fresh wctxs to be used every time and feel less icky. We could use `sel.inmemory` instead of `self.wctx.isinmemory()`.

REPOSITORY
  rHG Mercurial

REVISION DETAIL
  https://phab.mercurial-scm.org/D1679

To: phillco, #hg-reviewers
Cc: mercurial-devel