CWG3172 Reference to wrong placeholder

Author: burblebee

source/templates.tex

@@ -2194,7 +2194,7 @@
 in the normal form \tcode{N} of \tcode{CE},
 appearances of \tcode{C}{'s} template parameters
 in the parameter mappings of the atomic constraints in \tcode{N}
-with their respective arguments from \tcode{C}.
+with their respective arguments from \tcode{CI}.
 If any such substitution results in an invalid type or expression,
 the program is ill-formed; no diagnostic is required.
 \end{itemize}