Fix copy-pasta

Author: frederick-vs-ja

libcxx/include/tuple

@@ -1354,9 +1354,9 @@ tuple_cat(_Tuple0&& __t0, _Tuples&&... __tpls) {
   using _T0Indices _LIBCPP_NODEBUG   = typename __make_tuple_indices<tuple_size<_T0>::value>::type;
   using _TRetIndices _LIBCPP_NODEBUG = typename __make_tuple_indices<tuple_size<_TRet>::value>::type;
   return std::__tuple_cat_select_element_wise<_TRet>(
-      __tuple_cat<tuple<>, __tuple_indices<>, _T0Indice>()(
+      __tuple_cat<tuple<>, __tuple_indices<>, _T0Indices>()(
           tuple<>(), std::forward<_Tuple0>(__t0), std::forward<_Tuples>(__tpls)...),
-      _TRetIndice());
+      _TRetIndices());
 }
 
 template <class... _Tp, class _Alloc>