fix wrong links, fix #1086

source/03_language_reference/01_About_the_Language_Reference.md

@@ -19,14 +19,14 @@ Swift 语言相对较小，这是由于 Swift 代码中常用的类型、函数
 
 > getter-setter 方法块语法
 > 
-> *getter-setter 方法块* → { [getter 子句](./06_Declarations.md#getter-clause) [setter 子句](./06-Declarations.md#setter-clause)<sub>可选</sub> } | { [setter 子句](./06-Declarations.md#setter-clause) [getter 子句](./06-Declarations.md#getter-clause) }
+> *getter-setter 方法块* → { [getter 子句](./06_Declarations.md#getter-clause) [setter 子句](./06_Declarations.md#setter-clause)<sub>可选</sub> } | { [setter 子句](./06_Declarations.md#setter-clause) [getter 子句](./06_Declarations.md#getter-clause) }
 
 这个定义表明，一个 getter-setter 方法块可以由一个 getter 分句后跟一个可选的 setter 分句构成，然后用大括号括起来，或者由一个 setter 分句后跟一个 getter 分句构成，然后用大括号括起来。上述的语法产式等价于下面的两个语法产式, ：
 
 > getter-setter 方法块语法
 > 
-> getter-setter 方法块 → { [getter 子句](./06_Declarations.md#getter-clause) [setter 子句](./06-Declarations.md#setter-clause)<sub>可选</sub> }
+> getter-setter 方法块 → { [getter 子句](./06_Declarations.md#getter-clause) [setter 子句](./06_Declarations.md#setter-clause)<sub>可选</sub> }
 > 
-> getter-setter 方法块 → { [setter 子句](./06_Declarations.md#setter-clause) [getter 子句](./06-Declarations.md#getter-clause) }
+> getter-setter 方法块 → { [setter 子句](./06_Declarations.md#setter-clause) [getter 子句](./06_Declarations.md#getter-clause) }
 >