Changes according to review

Author: davidbrochart

include/xtensor/xchunked_array.hpp

@@ -338,12 +338,9 @@ namespace xt
     xchunked_array<xarray<xarray<T>>, EXT> chunked_array(std::initializer_list<S> shape, std::initializer_list<S> chunk_shape, layout_type chunk_memory_layout)
     {
         using sh_type = std::vector<std::size_t>;
-        sh_type sh = xtl::make_sequence<sh_type>(shape.size());
-        std::copy(shape.begin(), shape.end(), sh.begin());
-        sh_type ch_sh = xtl::make_sequence<sh_type>(chunk_shape.size());
-        std::copy(chunk_shape.begin(), chunk_shape.end(), ch_sh.begin());
-        using chunk_storage = xarray<xarray<T, L>>;
-        return xchunked_array<chunk_storage, EXT>(chunk_storage(), std::move(sh), std::move(ch_sh), chunk_memory_layout);
+        auto sh = xtl::forward_sequence<sh_type, std::initializer_list<S>>(shape);
+        auto ch_sh = xtl::forward_sequence<sh_type, std::initializer_list<S>>(chunk_shape);
+        return chunked_array<T, L, EXT, sh_type>(std::move(sh), std::move(ch_sh), chunk_memory_layout);
     }
 
     template <layout_type L, class EXT, class E, class S>