Function difft::diff::unchanged::split_unchanged_singleton_list

fn split_unchanged_singleton_list<'a>(
    lhs_nodes: &[&'a Syntax<'a>],
    rhs_nodes: &[&'a Syntax<'a>],
    size_threshold: u32
) -> Vec<(ChangeState, Vec<&'a Syntax<'a>>, Vec<&'a Syntax<'a>>)>