```rust
// ... more code ...

/// Adds 5 to the integer passed in.
///
/// # Examples
///
/// ```rust
/// # // The '#' will prevent rust code from appearing
/// # // in coding examples in your documentation
/// # // but will still run.
/// #
/// # // Here we're bringing our `add_five` function
/// # // into scope.
/// #
/// # use addition_functions::add_five;
///  assert_eq!(15, add_five(10))
/// ```
pub fn add_five(number: usize) -> usize {
    // I chose to return explicitly here
    // for clarity in a blog where we're learning
    // how to write comments
    return number + 5;
}

// ... more code ...
```