fixup stdout output format

rsscombine.go

@@ -186,7 +186,7 @@ func main() {
 	log.Printf("Rendered RSS with %v items", len(combinedFeed.Items))
 	// if no S3 bucket is defined, simply print the feed on standard output
 	if len(bucket) == 0 {
-		fmt.Printf(atom)
+		fmt.Print(atom)
 		return
 	}
 	// Upload the feed to S3