fix: go.mod

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 -x 500 -y 500 -c 3 -out example/barnsley-fern.png**
+Image on this page was generated with **./barnsley-fern-go -h 500 -v 500 -rainbow**

go.mod

@@ -1,5 +1,3 @@
 module code.uint32.ru/dmitry/barnsley-fern-go
 
 go 1.24.1
-
-require github.com/AlexEidt/Vidio v1.5.1 // indirect

go.sum

@@ -1,2 +0,0 @@
-github.com/AlexEidt/Vidio v1.5.1 h1:tovwvtgQagUz1vifiL9OeWkg1fP/XUzFazFKh7tFtaE=
-github.com/AlexEidt/Vidio v1.5.1/go.mod h1:djhIMnWMqPrC3X6nB6ymGX6uWWlgw+VayYGKE1bNwmI=

image.go

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