--- a/libtommath/bn_mp_exch.c	Wed Feb 28 22:11:39 2018 +0800
+++ b/libtommath/bn_mp_exch.c	Thu Oct 15 19:55:15 2020 +0800
@@ -1,34 +1,17 @@
-#include <tommath_private.h>
+#include "tommath_private.h"
 #ifdef BN_MP_EXCH_C
-/* LibTomMath, multiple-precision integer library -- Tom St Denis
- *
- * LibTomMath is a library that provides multiple-precision
- * integer arithmetic as well as number theoretic functionality.
- *
- * The library was designed directly after the MPI library by
- * Michael Fromberger but has been written from scratch with
- * additional optimizations in place.
- *
- * The library is free for all purposes without any express
- * guarantee it works.
- *
- * Tom St Denis, [email protected], http://libtom.org
- */
+/* LibTomMath, multiple-precision integer library -- Tom St Denis */
+/* SPDX-License-Identifier: Unlicense */
 
-/* swap the elements of two integers, for cases where you can't simply swap the 
+/* swap the elements of two integers, for cases where you can't simply swap the
  * mp_int pointers around
  */
-void
-mp_exch (mp_int * a, mp_int * b)
+void mp_exch(mp_int *a, mp_int *b)
 {
-  mp_int  t;
+   mp_int  t;
 
-  t  = *a;
-  *a = *b;
-  *b = t;
+   t  = *a;
+   *a = *b;
+   *b = t;
 }
 #endif
-
-/* ref:         $Format:%D$ */
-/* git commit:  $Format:%H$ */
-/* commit time: $Format:%ai$ */