改进一处 错误

library/think/db/Query.php

@@ -853,7 +853,9 @@ class Query
     {
         if (empty($this->options['table'])) {
             $tableName = $this->connection->getConfig('prefix');
-            $tableName .= Loader::parseName($this->options['name']);
+            if (isset($this->options['name'])) {
+                $tableName .= Loader::parseName($this->options['name']);
+            }
         } else {
             $tableName = $this->options['table'];
         }

library/traits/think/Instance.php

@@ -15,7 +15,10 @@ trait Instance
 {
     protected static $instance = null;
 
-    // 实例化（单例）
+    /**
+     * @param array $options
+     * @return static
+     */
     public static function instance($options = [])
     {
         if (is_null(self::$instance)) {