<s>[INST] Here is a function in Rust that reads and returns the lines of text in a file:
```
fn read_file_lines(file_path: &str) -> Vec<String> {
    std::fs::read_to_string(file_path).unwrap().lines().map(|line| line.to_string()).collect()
}
```
I prefer using `BufReader` instead of `read_to_string`. How to I convert this function to use `BufReader` instead?[/INST]