chore: remove blank lines (#2117)

* chore: remove blank lines

* chore: refactor

tools/goctl/api/docgen/doc.go

@@ -21,11 +21,13 @@ func genDoc(api *spec.ApiSpec, dir, filename string) error {
 	if len(api.Service.Routes()) == 0 {
 		return nil
 	}
+
 	fp, _, err := util.MaybeCreateFile(dir, "", filename)
 	if err != nil {
 		return err
 	}
 	defer fp.Close()
+
 	var builder strings.Builder
 	for index, route := range api.Service.Routes() {
 		routeComment := route.JoinedDoc()
@@ -61,6 +63,7 @@ func genDoc(api *spec.ApiSpec, dir, filename string) error {
 
 		builder.Write(tmplBytes.Bytes())
 	}
+
 	_, err = fp.WriteString(strings.Replace(builder.String(), """, `"`, -1))
 	return err
 }