git: 93b7af1d854d - main - diff: Re-add void argument to usage

The branch main has been updated by thj:

URL: https://cgit.FreeBSD.org/src/commit/?id=93b7af1d854db2a92dc9fcca70e068a159385f4d

commit 93b7af1d854db2a92dc9fcca70e068a159385f4d
Author:     Tom Jones <thj@FreeBSD.org>
AuthorDate: 2022-03-10 16:24:02 +0000
Commit:     Tom Jones <thj@FreeBSD.org>
CommitDate: 2022-03-10 16:24:02 +0000

    diff: Re-add void argument to usage
    
    Previous commit (8cf449db88b2c7a505bc241a78f9736b43f2ede5)
    unintentionally dropped the 'void' argument to usage, reinstate it.
    
    Sponsored by:   Klara Inc.
---
 usr.bin/diff/diff.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/usr.bin/diff/diff.c b/usr.bin/diff/diff.c
index ba6bc7c3a310..8b8b1f65c07b 100644
--- a/usr.bin/diff/diff.c
+++ b/usr.bin/diff/diff.c
@@ -582,7 +582,7 @@ print_status(int val, char *path1, char *path2, const char *entry)
 }
 
 static void
-usage()
+usage(void)
 {
 	(void)fprintf(help ? stdout : stderr,
 	    "usage: diff [-aBbdilpTtw] [-c | -e | -f | -n | -q | -u] [--ignore-case]\n"