Function similar::text::unified_diff

pub fn unified_diff<'old, 'new>(
    alg: Algorithm, 
    old: &'old str, 
    new: &'new str, 
    n: usize, 
    header: Option<(&str, &str)>
) -> String

Quick way to get a unified diff as string.

n configures UnifiedDiff::context_radius and header configures UnifiedDiff::header when not None.