Fix log format bug

core/logs/log_msg.go

@@ -37,7 +37,7 @@ func (lm *LogMsg) OldStyleFormat() string {
 	msg := lm.Msg
 
 	if len(lm.Args) > 0 {
-		lm.Msg = fmt.Sprintf(lm.Msg, lm.Args...)
+		msg = fmt.Sprintf(lm.Msg, lm.Args...)
 	}
 
 	msg = lm.Prefix + " " + msg

core/logs/log_msg_test.go

@@ -41,4 +41,8 @@ func TestLogMsg_OldStyleFormat(t *testing.T) {
 
 	res = lg.OldStyleFormat()
 	assert.Equal(t, "[D] [/user/home/main.go:13] Cus Hello, world", res)
+
+	lg.Msg = "hello, %s"
+	lg.Args = []interface{}{"world"}
+	assert.Equal(t, "[D] [/user/home/main.go:13] Cus hello, world", lg.OldStyleFormat())
 }

core/logs/log_test.go

@@ -18,9 +18,10 @@ import (
 	"testing"
 
 	"github.com/stretchr/testify/assert"
+
 )
 
-func TestBeeLogger_DelLogger(t *testing.T) {
+func TestBeeLoggerDelLogger(t *testing.T) {
 	prefix := "My-Cus"
 	l := GetLogger(prefix)
 	assert.NotNil(t, l)