fix the typo

config/yaml/yaml.go

@@ -281,7 +281,7 @@ func (c *ConfigContainer) DIY(key string) (v interface{}, err error) {
 func (c *ConfigContainer) getData(key string) (interface{}, error) {
 
 	if len(key) == 0 {
-		return nil, errors.New("key is emtpy")
+		return nil, errors.New("key is empty")
 	}
 
 	if v, ok := c.data[key]; ok {

router.go

@@ -434,7 +434,7 @@ func (p *ControllerRegister) InsertFilter(pattern string, pos int, filter Filter
 // add Filter into
 func (p *ControllerRegister) insertFilterRouter(pos int, mr *FilterRouter) (err error) {
 	if pos < BeforeStatic || pos > FinishRouter {
-		err = fmt.Errorf("can not find your filter postion")
+		err = fmt.Errorf("can not find your filter position")
 		return
 	}
 	p.enableFilter = true