tests/test-revert-flags.t

lfs: add the '{oid}' template keyword to '{lfs_files}'

The 'sha256:' prefix is skipped because this seems like the most convenient way
to consume it.  Maybe we should also add a '{oid_type}' keyword?  Then again,
that can be added in the future if a different algorithm is supported.

#require execbit

  $ hg init repo
  $ cd repo
  $ echo foo > foo
  $ chmod 644 foo
  $ hg ci -qAm '644'

  $ chmod 755 foo
  $ hg ci -qAm '755'

reverting to rev 0

  $ hg revert -a -r 0
  reverting foo
  $ hg st
  M foo
  $ hg diff --git
  diff --git a/foo b/foo
  old mode 100755
  new mode 100644

  $ cd ..