when I configure log.smtp ``` ini [log.smtp] #... RECEIVERS = ["a@mail.com"] #or ["a@mail.com","b@mail.com"] ``` got error ``` 2015/03/23 17:26:05 [I] Gogs 0.6.0.0319 Beta 2015/03/23 17:26:05 [I] Log Mode: File(Info) 2015/03/23 17:26:05 [log.go:294 Error()] [E] Fail to set logger(smtp): invalid character 'a' after object key:value pair r 'a' after object key:value pair ```