warning: the borrowed expression implements the required traits
   --> src/main.rs:347:39
    |
347 |     let f = BufReader::new(File::open(&path).unwrap());
    |                                       ^^^^^ help: change this to: `path`
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrows_for_generic_args
    = note: `#[warn(clippy::needless_borrows_for_generic_args)]` on by default

warning: unneeded `return` statement
  --> src/main.rs:38:9
   |
38 |         return "22".to_string();
   |         ^^^^^^^^^^^^^^^^^^^^^^^
   |
   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
   = note: `#[warn(clippy::needless_return)]` on by default
help: remove `return`
   |
38 -         return "22".to_string();
38 +         "22".to_string()
   |