Wrong example code which doesn't compile

[Xuanmizhen]

Page(s) Affected

https://www.rust-lang.org/learn/get-started
https://www.rust-lang.org/zh-CN/learn/get-started
https://www.rust-lang.org/zh-TW/learn/get-started
etc. (in other languages)

What needs to be fixed?

In the referred pages, the example code below the title A small Rust application DOESN'T compile.

error[E0308]: mismatched types
  --> src/main.rs:10:9
   |
10 |     say(message.as_bytes(), width, &mut writer).unwrap();
   |     --- ^^^^^^^^^^^^^^^^^^ expected `&str`, found `&[u8]`
   |     |
   |     arguments to this function are incorrect
   |
   = note: expected reference `&str`
              found reference `&[u8]`
note: function defined here
  --> /Users/username/.cargo/registry/src/index.crates.io-6f17d22bba15001f/ferris-says-0.3.1/src/lib.rs:84:8
   |
84 | pub fn say<W>(input: &str, max_width: usize, mut writer: W) -> Result<()>
   |        ^^^

For more information about this error, try `rustc --explain E0308`.
error: could not compile `rust-journey` (bin "rust-journey") due to previous error

Suggested Improvement

Fix the code with the following:

use ferris_says::say; // from the previous step
use std::io::{stdout, BufWriter};

fn main() {
    let stdout = stdout();
    let message = String::from("Hello fellow Rustaceans!");
    let width = message.chars().count();

    let mut writer = BufWriter::new(stdout.lock());
    say(&message, width, &mut writer).unwrap();        // Change only this line
}

[Xuanmizhen]

I've checked the version of ferris-says on my computer, and found that the version is 0.3.1, while the version mentioned on the website is 0.2.

[Manishearth]

Yes, the example on the website uses an older ferris-says, which it asks you to add as a dependency.

We should update both, though