[compare.syn][cmp.concept] Use \libconcept for three_way_comparable.

Author: Dawn Perchik

source/support.tex

@@ -4021,7 +4021,7 @@
   template<class... Ts>
     using common_comparison_category_t = typename common_comparison_category<Ts...>::type;
 
-  // \ref{cmp.concept}, concept \tcode{three_way_comparable}
+  // \ref{cmp.concept}, concept \libconcept{three_way_comparable}
   template<class T, class Cat = partial_ordering>
     concept three_way_comparable = @\seebelow@;
   template<class T, class U, class Cat = partial_ordering>
@@ -4709,7 +4709,7 @@
 \end{note}
 \end{itemdescr}
 
-\rSec2[cmp.concept]{Concept \tcode{three_way_comparable}}
+\rSec2[cmp.concept]{Concept \libconcept{three_way_comparable}}
 
 \begin{codeblock}
 template <typename T, typename Cat>