go-cat2 improve args loop

go-cat2/main.go

@@ -43,8 +43,8 @@ func main() {
 		reader = strings.NewReader(content)
 	} else {
 		readers := []io.Reader{}
-		for i := 1; i < len(os.Args); i++ {
-			f := openFile(&os.Args[i])
+		for _, fname := range os.Args[1:] {
+			f := openFile(&fname)
 			defer f.Close()
 			readers = append(readers, f)
 		}