fix example in `string-slice.md`
@ -292,8 +292,7 @@ fn main() {
s.push('r');
println!("追加字符 push() -> {}", s);
s.push_str("ust!")
;
s.push_str("ust!");
println!("追加字符串 push_str() -> {}", s);
}
```
@ -675,4 +674,4 @@ for b in "中国人".bytes() {
## 引用资料
1. https://blog.csdn.net/a1595901624/article/details/119294443