Function rustdoc::passes::collect_intra_doc_links::preprocess_link

fn preprocess_link<'a>(
    ori_link: &'a MarkdownLink
) -> Option<Result<PreprocessingInfo, PreprocessingError<'a>>>

Returns:

• None if the link should be ignored.
• Some(Err) if the link should emit an error
• Some(Ok) if the link is valid

link_buffer is needed for lifetime reasons; it will always be overwritten and the contents ignored.