CWG2242 ODR violation with constant initialization possibly omitted

Also fixes NB US 5-033 (C++23 CD).

Author: burblebee

source/basic.tex

@@ -675,6 +675,11 @@
 \item In each such definition, corresponding entities shall have the
 same language linkage.
 
+\item In each such definition,
+const objects with static or thread storage duration
+shall be constant-initialized if
+the object is constant-initialized in any such definition.
+
 \item In each such definition, the overloaded operators referred
 to, the implicit calls to conversion functions, constructors, operator
 new functions and operator delete functions, shall refer to the same