diff --git a/editor/editors.go b/editor/editors.go
index cac87d2..a22392e 100644
--- a/editor/editors.go
+++ b/editor/editors.go
@@ -103,6 +103,8 @@ func AutocompleteHandler(w http.ResponseWriter, r *http.Request) {
 	username := session.Values["username"].(string)
 
 	code := args["code"].(string)
+	// TODO: 保存文件
+
 	line := int(args["cursorLine"].(float64))
 	ch := int(args["cursorCh"].(float64))
 
diff --git a/editor/formatter.go b/editor/formatter.go
index d42c48b..77d6e02 100644
--- a/editor/formatter.go
+++ b/editor/formatter.go
@@ -11,6 +11,7 @@ import (
 	"github.com/golang/glog"
 )
 
+// gofmt 格式化 Go 源码文件.
 func GoFmtHandler(w http.ResponseWriter, r *http.Request) {
 	data := map[string]interface{}{"succ": true}
 	defer util.RetJSON(w, r, data)
@@ -71,6 +72,7 @@ func GoFmtHandler(w http.ResponseWriter, r *http.Request) {
 	}
 }
 
+// 格式化 HTML 文件.
 func HTMLFmtHandler(w http.ResponseWriter, r *http.Request) {
 	data := map[string]interface{}{"succ": true}
 	defer util.RetJSON(w, r, data)
@@ -127,6 +129,7 @@ func HTMLFmtHandler(w http.ResponseWriter, r *http.Request) {
 	}
 }
 
+// 格式化 JSON 文件.
 func JSONFmtHandler(w http.ResponseWriter, r *http.Request) {
 	data := map[string]interface{}{"succ": true}
 	defer util.RetJSON(w, r, data)