Function root_fix 

pub fn root_fix(
    req: &Request,
    select: &str,
    span: (usize, usize),
    links: bool,
) -> String

A refused selector source (§11.8 step 1): the same request over an admitted root — links becomes blocks (a link lives in a block), any other source docs — spliced over the source’s code-point span of the written query (the reference’s rootFix).