fix support for format

format.go

@@ -36,7 +36,7 @@ func isFormatString(f interface{}) bool {
 		return false
 	}
 	// 尝试使用空接口来格式化字符串
-	m := fmt.Sprintf(s, []interface{}{})
+	m := fmt.Sprintf(s, []interface{}{}...)
 	return strings.Index(m, "MISSING") != -1
 }
 

format_test.go

@@ -22,6 +22,16 @@ func TestFormat(t *testing.T) {
 			},
 			want: "test_category : INFO - key: value",
 		},
+		{
+			name: "Info level with one format string",
+			logEvent: LogEvent{
+				Ts:       time.Now(),
+				Category: "test_category",
+				Level:    Info,
+				Data:     []interface{}{"%s", "key"},
+			},
+			want: "test_category : INFO - key",
+		},
 		{
 			name: "Error level without format string",
 			logEvent: LogEvent{