CWG2645 Unused term "default argument promotions"

[cstdarg.syn] Employ bullets to separate the different conceptual areas
of differences from ISO C.

Fixes NB US 044 (C++23 CD).

Author: burblebee

source/support.tex

@@ -5783,6 +5783,11 @@
 \pnum
 The contents of the header \libheaderdef{cstdarg} are the same as the C
 standard library header \libheader{stdarg.h}, with the following changes:
+\begin{itemize}
+\item
+In lieu of the default argument promotions specified in ISO C 6.5.2.2,
+the definition in~\ref{expr.call} applies.
+\item
 The restrictions that ISO C places on the second parameter to the
 \indexlibraryglobal{va_start}%
 \tcode{va_start} macro in header \libheader{stdarg.h}
@@ -5808,6 +5813,7 @@
 is of a reference type, or of a type that is not compatible with the
 type that results when passing an argument for which there is no
 parameter, the behavior is undefined.
+\end{itemize}
 
 \xrefc{7.16.1.1}