[const.wrap.class] Add missing \exposid around cw-operators

Author: eisenwave

source/meta.tex

@@ -837,7 +837,7 @@
   };
 
   template<@\exposid{cw-fixed-value}@ X, class>
-  struct @\libglobal{constant_wrapper}@ : cw-operators {
+  struct @\libglobal{constant_wrapper}@ : @\exposid{cw-operators}@ {
     static constexpr const auto & value = X.@\exposid{data}@;
     using type = constant_wrapper;
     using value_type = decltype(X)::@\exposid{type}@;