Update char-bool.md

Add rust syntax highlight
pull/978/head
kebo 2 years ago committed by GitHub
parent 096071a589
commit ea051f8547
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@ -8,7 +8,7 @@
下面的代码展示了几个颇具异域风情的字符:
```
```rust
fn main() {
let c = 'z';
let z = '';

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