From 5ed26f909dd923dcd811784bc88efa46ad57bb30 Mon Sep 17 00:00:00 2001
From: Michael Forney <mforney@mforney.org>
Date: Tue, 21 Apr 2020 10:31:33 -0700
Subject: driver: Print unknown option before usage message

---
 driver.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/driver.c b/driver.c
index bcdfccd..39fcc7b 100644
--- a/driver.c
+++ b/driver.c
@@ -547,7 +547,7 @@ main(int argc, char *argv[])
 					usage("unknown language '%s'", arg);
 				break;
 			default:
-				usage(NULL);
+				usage("unknown option '%s'", arg);
 			}
 		}
 	}
-- 
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