Method insert_copy_before

Source/ThirdParty/pugixml/pugixml.cpp:5039–5047

	}

	PUGI__FN xml_attribute xml_node::insert_copy_before(const xml_attribute& proto, const xml_attribute& attr)
	{
		if (!proto) return xml_attribute();

		xml_attribute result = insert_attribute_before(proto.name(), attr);
		result.set_value(proto.value());

		return result;
	}

	PUGI__FN xml_node xml_node::append_child(xml_node_type type_)
	{