/// Example
/// ```rust
/// let fourtytwo = "42".parse::<u32>()?;
/// println!("{} + 10 = {}", fourtytwo, fourtytwo+10);
/// ```
fn foo() {}

/// Example
/// ```rust
/// # main() -> Result<(), std::num::ParseIntError> {
/// let fortytwo = "42".parse::<u32>()?;
/// println!("{} + 10 = {}", fortytwo, fortytwo+10);
/// #     Ok(())
/// # }
/// ```
fn fiz() {}

/// Example
/// ```rust
/// # fn main() -> Result<(), std::num::ParseIntError> {
/// let fortytwo = "42".parse::<u32>()?;
/// println!("{} + 10 = {}", fortytwo, fortytwo+10);
/// #     Ok(())
/// # }
/// ```
fn baz() {}

/// Example
/// ```rust
/// let fortytwo = "42".parse::<u32>()?;
/// println!("{} + 10 = {}", fortytwo, fortytwo+10);
/// #     Ok::<(), <u32 as std::str::FromStr>::Err>(())
/// ```
fn buz() {}