From 6b04c60f081f82190ef83dc417f02e853a01e73d Mon Sep 17 00:00:00 2001
From: midipix <writeonce@midipix.org>
Date: Nov 11 2016 04:35:35 +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 97b2af1..f6ffa48 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: