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/// Add one to the given number
/// # Examples
/// ```
/// let result = x_14_::add_one(5);
/// assert_eq!(result, 6);
///
/// ```
pub fn add_one(x: i32) -> i32 {
    x + 1
}

#[test]
fn test_add_one() {
    let result = add_one(5);
    assert_eq!(result, 6);
}