merge args if it have same type (#1059)

gin.go

@@ -268,7 +268,7 @@ func (engine *Engine) Run(addr ...string) (err error) {
 // RunTLS attaches the router to a http.Server and starts listening and serving HTTPS (secure) requests.
 // It is a shortcut for http.ListenAndServeTLS(addr, certFile, keyFile, router)
 // Note: this method will block the calling goroutine indefinitely unless an error happens.
-func (engine *Engine) RunTLS(addr string, certFile string, keyFile string) (err error) {
+func (engine *Engine) RunTLS(addr, certFile, keyFile string) (err error) {
 	debugPrint("Listening and serving HTTPS on %s\n", addr)
 	defer func() { debugPrintError(err) }()