Fix oopsie in iteration over files, now use files instead of args

main.go

@@ -40,7 +40,7 @@ func main() {
 	logger.Info("Patterns expanded to %d files", len(files))
 
 	wg := sync.WaitGroup{}
-	for _, file := range flag.Args() {
+	for _, file := range files {
 		wg.Add(1)
 		go func(file string) {
 			defer wg.Done()