Function render_contract 

fn render_contract<'ast, 'gcx>(
    _span: Span,
    c: &'ast ItemContract<'ast>,
    docs: &'ast DocComments<'ast>,
    ctx: &Ctx<'_>,
    gcx: Gcx<'gcx>,
    hir_id: Option<ContractId>,
    name_to_page: &NameToPage,
    page_path: &Path,
    git_url: Option<&str>,
    deployments: &[Deployment],
) -> String