fix typo

README.md

@@ -35,7 +35,6 @@ Options:
     	sets the file extension to scan for. (default ".go")
   -license string
     	sets the license type to check: ASL2, Elastic (default "ASL2")
-
 ```
 
 ## Contributing

main.go

@@ -129,7 +129,7 @@ func main() {
 func run(args []string, license string, exclude []string, ext string, dry bool, out io.Writer) error {
 	header, ok := Headers[license]
 	if !ok {
-		return &Error{err: fmt.Errorf("unkown license: %s", license), code: errUnknownLicense}
+		return &Error{err: fmt.Errorf("unknown license: %s", license), code: errUnknownLicense}
 	}
 
 	var headerBytes []byte

main_test.go

@@ -186,7 +186,7 @@ testdata/x-pack/wrong.go: is missing the license header
 				dry:     false,
 			},
 			want: 7,
-			err:  &Error{err: errors.New("unkown license: foo"), code: 7},
+			err:  &Error{err: errors.New("unknown license: foo"), code: 7},
 		},
 		{
 			name: "Run with default mode rewrites the source files",