readme.md example broken out of the box

[Tatsujinichi]

use serde::{Deserialize, Serialize};
use serde_xml_rs::{from_str, to_string};

#[derive(Debug, Serialize, Deserialize, PartialEq)]
struct Item {
name: String,
source: String,
}

fn main() {
let src = r#"BananaStore"#;
let should_be = Item {
name: "Banana".to_string(),
source: "Store".to_string(),
};

let item: Item = from_str(src).unwrap();
assert_eq!(item, should_be);

let reserialized_item = to_string(&item).unwrap();
assert_eq!(src, reserialized_item);
}

$ cargo run
Finished dev [unoptimized + debuginfo] target(s) in 0.07s
Running target\debug\example.exe
thread 'main' panicked at 'assertion failed: (left == right)
left: "<Item><name>Banana</name><source>Store</source></Item>",
right: "<?xml version=\"1.0\" encoding=\"UTF-8\"?><Item><name>Banana</name><source>Store</source></Item>"', src\main.rs:21:5
note: run with RUST_BACKTRACE=1 environment variable to display a backtrace
error: process didn't exit successfully: target\debug\example.exe (exit code: 101)