Merge branch 'rr/rebase-autostash-fix' into maint

The autostash mode of "git rebase -i" did not restore the dirty working tree state if the user aborted the interactive rebase by emptying the insn sheet. * rr/rebase-autostash-fix: rebase -i: test "Nothing to do" case with autostash rebase -i: handle "Nothing to do" case with autostash