Fix usage: file is optional

Signed-off-by: Mattias Andrée <maandree@kth.se>

1 files changed, 1 insertions, 1 deletions

diff --git a/xtest.c b/xtest.c
index 3b4edd5..cbf3015 100644
--- a/xtest.c
+++ b/xtest.c
@@ -75,7 +75,7 @@ static int (*testmap[])(char *) = {
 static void
 usage(void)
 {
-	fprintf(stderr, "usage: %s [-0bcdefghkLprSstuwx] [+bcdefghkLprSstuwx] file ...\n", argv0);
+	fprintf(stderr, "usage: %s [-0bcdefghkLprSstuwx] [+bcdefghkLprSstuwx] [file ...]\n", argv0);
 	exit(1);
 }