[expr.call][expr.const] Index use of va_arg macro

Author: AlisdairM

source/expressions.tex

@@ -3511,7 +3511,7 @@
 \indextext{ellipsis!conversion sequence}%
 When there is no parameter for a given argument, the argument is passed
 in such a way that the receiving function can obtain the value of the
-argument by invoking \tcode{va_arg}\iref{support.runtime}.
+argument by invoking \libmacro{va_arg}\iref{support.runtime}.
 \begin{note}
 This paragraph does not apply to arguments passed to a function parameter pack.
 Function parameter packs are expanded during template instantiation\iref{temp.variadic},
@@ -7912,7 +7912,7 @@
 an \grammarterm{asm-declaration}\iref{dcl.asm};
 
 \item
-an invocation of the \tcode{va_arg} macro\iref{cstdarg.syn};
+an invocation of the \libmacro{va_arg} macro\iref{cstdarg.syn};
 
 \item
 a non-constant library call\iref{defns.nonconst.libcall};