From a5a4fd2e0db8cdd06736afb526ffdc26e24de47d Mon Sep 17 00:00:00 2001
From: songzhibin97 <49082129+songzhibin97@users.noreply.github.com>
Date: Sat, 21 May 2022 16:23:50 +0800
Subject: [PATCH] Update metadata.go (#2015)

---
 metadata/metadata.go | 9 +++------
 1 file changed, 3 insertions(+), 6 deletions(-)

diff --git a/metadata/metadata.go b/metadata/metadata.go
index 2180465d4..be1806259 100644
--- a/metadata/metadata.go
+++ b/metadata/metadata.go
@@ -24,8 +24,7 @@ func New(mds ...map[string]string) Metadata {
 
 // Get returns the value associated with the passed key.
 func (m Metadata) Get(key string) string {
-	k := strings.ToLower(key)
-	return m[k]
+	return m[strings.ToLower(key)]
 }
 
 // Set stores the key-value pair.
@@ -33,15 +32,13 @@ func (m Metadata) Set(key string, value string) {
 	if key == "" || value == "" {
 		return
 	}
-	k := strings.ToLower(key)
-	m[k] = value
+	m[strings.ToLower(key)] = value
 }
 
 // Range iterate over element in metadata.
 func (m Metadata) Range(f func(k, v string) bool) {
 	for k, v := range m {
-		ret := f(k, v)
-		if !ret {
+		if !f(k, v) {
 			break
 		}
 	}