[iomanip.syn] Fix std::setfill() template declaration

Author: dgrunwald-qt

source/iostreams.tex

@@ -4105,7 +4105,7 @@
   @\textit{T1}@ resetiosflags(ios_base::fmtflags mask);
   @\textit{T2}@ setiosflags  (ios_base::fmtflags mask);
   @\textit{T3}@ setbase(int base);
-  template<charT> @\textit{T4}@ setfill(charT c);
+  template<class charT> @\textit{T4}@ setfill(charT c);
   @\textit{T5}@ setprecision(int n);
   @\textit{T6}@ setw(int n);
   template <class moneyT> @\textit{T7}@ get_money(moneyT& mon, bool intl = false);