style: correct printing errors variable.md content

correct printing errors
pull/256/head
Eric(书生) 3 years ago committed by GitHub
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@ -99,7 +99,7 @@ The value of x is: 6
### 变量解构
let表达式不仅仅用于变量的绑定还能进行复杂变量的解构从一个相对复杂的变量中匹配出该变量的一部分内.
let表达式不仅仅用于变量的绑定还能进行复杂变量的解构从一个相对复杂的变量中匹配出该变量的一部分内.
```rust
fn main() {

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