LWG3782 Should <math.h> declare ::lerp?

Author: burblebee

source/support.tex

@@ -6158,6 +6158,7 @@
 header is placed within
 the global namespace scope,
 except for the functions described in \ref{sf.cmath},
+the \tcode{std::lerp} function overloads\iref{c.math.lerp},
 the declaration of \tcode{std::byte}\iref{cstddef.syn}, and
 the functions and function templates described in \ref{support.types.byteops}.
 It is unspecified whether these names are first declared or defined within