[flat.{,multi}set] Change stable label from "ctor" to "cons"

Author: tkoeppe

source/containers.tex

@@ -16345,7 +16345,7 @@
     using const_reverse_iterator    = std::reverse_iterator<const_iterator>;
     using container_type            = KeyContainer;
 
-    // \ref{flat.set.ctor}, constructors
+    // \ref{flat.set.cons}, constructors
     flat_set() : flat_set(key_compare()) { }
 
     explicit flat_set(container_type cont);
@@ -16551,7 +16551,7 @@
 }
 \end{codeblock}
 
-\rSec3[flat.set.ctor]{Constructors}
+\rSec3[flat.set.cons]{Constructors}
 
 \indexlibraryctor{flat_set}%
 \begin{itemdecl}
@@ -16945,7 +16945,7 @@
     using const_reverse_iterator    = std::reverse_iterator<const_iterator>;
     using container_type            = KeyContainer;
 
-    // \ref{flat.multiset.ctor}, constructors
+    // \ref{flat.multiset.cons}, constructors
     flat_multiset() : flat_multiset(key_compare()) { }
 
     explicit flat_multiset(container_type cont);
@@ -17152,7 +17152,7 @@
 }
 \end{codeblock}
 
-\rSec3[flat.multiset.ctor]{Constructors}
+\rSec3[flat.multiset.cons]{Constructors}
 
 \indexlibraryctor{flat_multiset}%
 \begin{itemdecl}