From 55faed6a1cdc906cdd7f5c81b155810d3d949ecc Mon Sep 17 00:00:00 2001
From: midipix <writeonce@midipix.org>
Date: Nov 11 2016 05:22:33 +0000
Subject: argv.h: argv_show_error(): prefix illegal short options with a dash.


---

diff --git a/src/internal/argv/argv.h b/src/internal/argv/argv.h
index e0cc5f3..fd0c3ac 100644
--- a/src/internal/argv/argv.h
+++ b/src/internal/argv/argv.h
@@ -478,7 +478,7 @@ static void argv_show_error(struct argv_ctx * ctx)
 
 	switch (ctx->errcode) {
 		case ARGV_ERROR_SHORT_OPTION:
-			fprintf(stderr,"'%c' is not a valid short option\n",*ctx->errch);
+			fprintf(stderr,"'-%c' is not a valid short option\n",*ctx->errch);
 			break;
 
 		case ARGV_ERROR_LONG_OPTION: