Maybe these two examples could be merged to be like

```rust
use html;
let original = "<p>Dr. Jekyll & Mr. Hyde</p>";

let escaped = html::escape(original)
assert_eq!(escaped.as_slice(), "&lt;p&gt;Dr. Jekyll &amp; Mr. Hyde&lt;p&gt;");

let unescaped = html::unescape(escaped);
assert_eq!(unescaped.as_slice(), original);
```