fix golint issues (#450)

tools/goctl/api/javagen/genpacket.go

@@ -107,7 +107,7 @@ func createWith(dir string, api *spec.ApiSpec, route spec.Route, packetName stri
 	}
 
 	_, err = fp.WriteString(formatSource(tmplBytes.String()))
-	return nil
+	return err
 }
 
 func doc(route spec.Route) string {

tools/goctl/api/parser/g4/test/type_test.go

@@ -334,13 +334,13 @@ func TestTypeBlock(t *testing.T) {
 		return p.TypeBlock().Accept(visitor)
 	}
 	t.Run("normal", func(t *testing.T) {
-		v, err := parser.Accept(fn, `type(
+		_, err := parser.Accept(fn, `type(
 			// doc
 			Foo int
 		)`)
 		assert.Error(t, err)
 
-		v, err = parser.Accept(fn, `type (
+		v, err := parser.Accept(fn, `type (
 			// doc
 			Foo {
 				Bar int

tools/goctl/model/sql/builderx/builder.go

@@ -49,7 +49,7 @@ func ToMap(in interface{}) map[string]interface{} {
 	return out
 }
 
-// deprecated: use RawFieldNames instead automaticly while model generating after goctl version v1.1.0
+// deprecated: use RawFieldNames instead automatically while model generating after goctl version v1.1.0
 func FieldNames(in interface{}) []string {
 	out := make([]string, 0)
 	v := reflect.ValueOf(in)