[refwrap.general] Add cross-references to the class synopsis (#5122)

Also rename [refwrap.const], because it does not specify
any destructors.

Author: jensmaurer

source/utilities.tex

@@ -14372,19 +14372,19 @@
     // types
     using type = T;
 
-    // construct/copy/destroy
+    // \ref{refwrap.const}, constructors
     template<class U>
       constexpr reference_wrapper(U&&) noexcept(@\seebelow@);
     constexpr reference_wrapper(const reference_wrapper& x) noexcept;
 
-    // assignment
+    // \ref{refwrap.assign}, assignment
     constexpr reference_wrapper& operator=(const reference_wrapper& x) noexcept;
 
-    // access
+    // \ref{refwrap.access}, access
     constexpr operator T& () const noexcept;
     constexpr T& get() const noexcept;
 
-    // invocation
+    // \ref{refwrap.invoke}, invocation
     template<class... ArgTypes>
       constexpr invoke_result_t<T&, ArgTypes...> operator()(ArgTypes&&...) const;
   };
@@ -14405,7 +14405,7 @@
 The template parameter \tcode{T} of \tcode{reference_wrapper}
 may be an incomplete type.
 
-\rSec3[refwrap.const]{Constructors and destructor}
+\rSec3[refwrap.const]{Constructors}
 
 \indexlibraryctor{reference_wrapper}%
 \begin{itemdecl}