Verbose errors for message formatting failures

telegram/utils.go

@@ -221,7 +221,7 @@ func (c *Client) formatMessage(chatID int64, messageID int64, preview bool, mess
 			MessageId: messageID,
 		})
 		if err != nil {
-			return "<error fetching message>"
+			return fmt.Sprintf("<error fetching message: %s>", err.Error())
 		}
 	}