diff: Nits in tests.

Sponsored by:	Klara, Inc.

lib/libdiff/tests/libdiff_test.c

@@ -9,6 +9,7 @@
 
 #include <assert.h>
 #include <errno.h>
+#include <stdint.h>
 #include <stdio.h>
 #include <string.h>
 #include <unistd.h>

usr.bin/diff/tests/diff_test.sh

@@ -96,7 +96,6 @@ b278988_body()
 	printf 'a\n\nb\nn' > b278988.b.in
 	atf_check -o empty -s eq:0 \
 		diff -Bw b278988.a.in b278988.b.in
-
 }
 
 header_body()