LWG3824 Number of bind placeholders is underspecified

Fixes NB GB 95 (C++23 CD).

Author: burblebee

source/utilities.tex

@@ -11798,9 +11798,13 @@
 \indexlibrary{8@\tcode{_8}}%
 \indexlibrary{9@\tcode{_9}}%
 \indexlibrary{10@\tcode{_10}}%
+% FIXME: Fomatting for M and the members _1, _2, _M below,
+% as well as their usages elsewhere is inconsistent.
+% Should they all follow the formatting used in delcaration of
+% "namespace placeholders" in [functional.syn]?
 \begin{codeblock}
 namespace std::placeholders {
-  // M is the \impldef{number of placeholders for bind expressions} number of placeholders
+  // M is the number of placeholders
   @\seebelow@ _1;
   @\seebelow@ _2;
               .
@@ -11810,6 +11814,10 @@
 }
 \end{codeblock}
 
+\pnum
+The number \tcode{\placeholder{M}} of placeholders is
+\impldef{number of placeholders for bind expressions}.
+
 \pnum
 All placeholder types meet the \oldconcept{DefaultConstructible} and
 \oldconcept{CopyConstructible} requirements, and