[array.syn] Add reference to [array.tuple]

Author: JohelEGP

source/containers.tex

@@ -3087,6 +3087,7 @@
   template<class T, size_t N>
     constexpr void swap(array<T, N>& x, array<T, N>& y) noexcept(noexcept(x.swap(y)));
 
+  // \ref{array.tuple}, tuple interface to class template \tcode{array}
   template<class T> class tuple_size;
   template<size_t I, class T> class tuple_element;
   template<class T, size_t N>