Merge branch 'os/fix-rebase-diff-no-prefix'

* os/fix-rebase-diff-no-prefix:
  Add --src/dst-prefix to git-formt-patch in git-rebase.sh

Author: gitster

git-rebase.sh

@@ -566,6 +566,7 @@ fi
 if test -z "$do_merge"
 then
 	git format-patch -k --stdout --full-index --ignore-if-in-upstream \
+		--src-prefix=a/ --dst-prefix=b/ \
 		--no-renames $root_flag "$revisions" |
 	git am $git_am_opt --rebasing --resolvemsg="$RESOLVEMSG" &&
 	move_to_original_branch