From e2cc195808e9d6e650ea902eafe66b37014e0cc6 Mon Sep 17 00:00:00 2001
From: sta <sta.blockhead@gmail.com>
Date: Fri, 28 Sep 2018 19:50:28 +0900
Subject: [PATCH] [Modify] Replace it

---
 websocket-sharp/Net/HttpUtility.cs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/websocket-sharp/Net/HttpUtility.cs b/websocket-sharp/Net/HttpUtility.cs
index a3dfb9cf..17e6c923 100644
--- a/websocket-sharp/Net/HttpUtility.cs
+++ b/websocket-sharp/Net/HttpUtility.cs
@@ -857,7 +857,7 @@ namespace WebSocketSharp.Net
       if (output == null)
         throw new ArgumentNullException ("output");
 
-      output.Write (HtmlAttributeEncode (s));
+      output.Write (s.Length > 0 ? htmlAttributeEncode (s) : s);
     }
 
     /// <summary>