Lint fix

Signed-off-by: Jean-Noël Moyne <[email protected]>

server/consumer.go

@@ -3347,7 +3347,7 @@ func (o *consumer) processNextMsgRequest(reply string, msg []byte) {
 			}
 		}
 		if !matching {
-			sendErr(409, fmt.Sprint("Request's medata does not match the consumer's"))
+			sendErr(409, "Request's medata does not match the consumer's")
 			return
 		}
 	}