Function format_detailed 

pub fn format_detailed(
    result: &TestResult,
    bytes: bool,
    dl_bytes: u64,
    ul_bytes: u64,
    dl_duration: f64,
    ul_duration: f64,
) -> Result<(), SpeedtestError>

Detailed mode — clean key/value pairs.

Errors

This function does not currently return errors, but the signature is Result for future extensibility.