Function format 

pub fn format(
    raw: &[u8],
    pattern: &str,
    opts: SearchOptions,
    c: CompactOpts,
) -> Page

Reshape raw (ripgrep’s path:line:text output) into a compact page. pattern/opts are used only to locate the match within long lines for centered truncation. Pagination is keyset (resume after start_after), not offset, so it stays correct when the result set shifts between calls; mode selects the matches / files (-l) / count (-c) shape.