Merge branch 'ps/rebase-i-auto-unstash-upon-abort' into maint

"git rebase -i --autostash" did not restore the auto-stashed change
when the operation was aborted.

* ps/rebase-i-auto-unstash-upon-abort:
  rebase -i: restore autostash on abort

git-rebase--interactive.sh

@@ -212,6 +212,7 @@ exit_with_patch () {
 }
 
 die_abort () {
+	apply_autostash
 	rm -rf "$state_dir"
 	die "$1"
 }