[stacktrace] Change stable label from "ctor" to "cons"

Author: tkoeppe

source/diagnostics.tex

@@ -1759,7 +1759,7 @@
   public:
     using native_handle_type = @\impdefx{\tcode{stacktrace_entry::native_handle_type}}@;
 
-    // \ref{stacktrace.entry.ctor}, constructors
+    // \ref{stacktrace.entry.cons}, constructors
     constexpr stacktrace_entry() noexcept;
     constexpr stacktrace_entry(const stacktrace_entry& other) noexcept;
     constexpr stacktrace_entry& operator=(const stacktrace_entry& other) noexcept;
@@ -1792,7 +1792,7 @@
 \libconcept{regular}\iref{concepts.object} and
 \tcode{\libconcept{three_way_comparable}<strong_ordering>}\iref{cmp.concept}.
 
-\rSec3[stacktrace.entry.ctor]{Constructors}
+\rSec3[stacktrace.entry.cons]{Constructors}
 
 \indexlibraryctor{stacktrace_entry}%
 \begin{itemdecl}
@@ -1933,7 +1933,7 @@
     using size_type = @\impdefx{type of \tcode{basic_stacktrace::size_type}}@;
     using allocator_type = Allocator;
 
-    // \ref{stacktrace.basic.ctor}, creation and assignment
+    // \ref{stacktrace.basic.cons}, creation and assignment
     static basic_stacktrace current(const allocator_type& alloc = allocator_type()) noexcept;
     static basic_stacktrace current(size_type skip,
                                     const allocator_type& alloc = allocator_type()) noexcept;
@@ -2009,7 +2009,7 @@
 are different from those required for a container.
 \end{itemize}
 
-\rSec3[stacktrace.basic.ctor]{Creation and assignment}
+\rSec3[stacktrace.basic.cons]{Creation and assignment}
 
 \indexlibrarymember{current}{basic_stacktrace}%
 \begin{itemdecl}