[CWEB] End reading cwebacromac unless loaded from cwebmac.

I really should have tried 'tex cwebacromac'. :o)
Luckily, '\acrohint' never is defined.

git-svn-id: svn://tug.org/texlive/trunk/Build/source@68591 c570f23f-e606-0410-a88d-b1316a301751

texk/web2c/cwebdir/cwebacromac.tex

@@ -1,6 +1,6 @@
 % hypertext macros for CWEB listings (in addition to cwebmac.tex)
 % Version 1.1 --- September 2023
-\ifx\acrohint\undefined\else\endinput\fi % these are not standalone macros
+\ifx\ifacrohint\undefined\endinput\fi % these are not standalone macros
 \ifluatex % LuaTeX is almost like pdfTeX
 \protected\def\pdfliteral   {\pdfextension literal}
 \protected\def\pdfstartlink {\pdfextension startlink\space}