Updated 多表查询 (markdown)

多表查询.md

@@ -115,11 +115,12 @@ fsql.Select<Topic>()
 v1.8.0+ string.Join + ToList 实现将子查询的多行结果，拼接为一个字符串，如："1,2,3,4"
 
 ```csharp
-fsql.Select<Topic>()
-  .ToList(a => new {
-    id = a.Id,
-    concat = string.Join(",", fsql.Select<StringJoin01>().ToList(b => b.Id))
-  });
+fsql.Select<Topic>().ToList(a => new {
+  id = a.Id,
+  concat = string.Join(",", 
+    fsql.Select<StringJoin01>()
+      .ToList(b => b.Id))
+});
 //SELECT a.`Id`, (SELECT group_concat(b.`name` separator ',') 
 //    FROM `StringJoin01` b) 
 //FROM `Topic` a