tidy up

README.md

@@ -16,4 +16,4 @@ This will generate an image in current directory.
 
 See **./barnsley-fern --help** for available flags.
 
-Image on this page was generated with **./barnsley-fern-go -h 500 -v 500 -rainbow**
+Image on this page was generated with **./barnsley-fern-go -x 500 -y 500 -c 3 -out example/barnsley-fern.png**

image.go

@@ -35,7 +35,7 @@ func createBarnsleyFernImage(s *settings, w io.Writer) error {
 		}
 
 	default:
-		return fmt.Errorf("%w: %d", s.OM)
+		return fmt.Errorf("%w: %d", errUnknownFormat, s.OM)
 	}
 
 	return nil

main.go

@@ -19,9 +19,6 @@ func run() int {
 		return 1
 	}
 
-	defer func() {
-	}()
-
 	if err := createBarnsleyFernImage(s, file); err != nil {
 		fmt.Println("ошибка создания изображения:", err)
 		return 2
@@ -32,7 +29,7 @@ func run() int {
 		return 3
 	}
 
-	fmt.Println("done...")
+	fmt.Println("done")
 
 	return 0
 }