From d944d68fe6ebbde4aaafa592d8d0a2b935548cf8 Mon Sep 17 00:00:00 2001
From: Xing GUO <higuoxing@gmail.com>
Date: Tue, 31 Dec 2019 14:38:21 +0800
Subject: [PATCH] Document `NewMessageToChannel` clearer

---
 helpers.go | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/helpers.go b/helpers.go
index 3dabe11..294f31b 100644
--- a/helpers.go
+++ b/helpers.go
@@ -29,7 +29,8 @@ func NewDeleteMessage(chatID int64, messageID int) DeleteMessageConfig {
 // NewMessageToChannel creates a new Message that is sent to a channel
 // by username.
 //
-// username is the username of the channel, text is the message text.
+// username is the username of the channel, text is the message text,
+// and the username should be in the form of `@username`.
 func NewMessageToChannel(username string, text string) MessageConfig {
 	return MessageConfig{
 		BaseChat: BaseChat{