By avoiding formatting and allocations in the no-ident case, and by making the span mandatory if the ident exists. Use the optimized `opt_item_ident` to cleanup `fn each_child_of_item`
By avoiding formatting and allocations in the no-ident case, and by making the span mandatory if the ident exists. Use the optimized `opt_item_ident` to cleanup `fn each_child_of_item`