rustdoc: a few micro-optimizations targeted at build_impl Unsure if these will be anything substantial, but the first one at least should git rid of quite a few branches, second one unsure if it's worth it. r? `@GuillaumeGomez`
rustdoc: a few micro-optimizations targeted at build_impl Unsure if these will be anything substantial, but the first one at least should git rid of quite a few branches, second one unsure if it's worth it. r? `@GuillaumeGomez`