/* __mpn_sub_n -- Add two limb vectors of the same length > 0 and store
sum in a third limb vector.
- Copyright (C) 2000-2019 Free Software Foundation, Inc.
+ Copyright (C) 2000-2020 Free Software Foundation, Inc.
Contributed by Martin Schwidefsky (schwidefsky@de.ibm.com).
This file is part of the GNU MP Library.