Fixed small errors in C++-part

examples/04_cpp17.cpp

@@ -5,7 +5,7 @@
 // $CC -Wall -Werror -pedantic -pedantic-errors -std=c++1z -o $OUT $IN
 
 /* "Old" code:
- * The usage of auto to implicitly get the return type is C++17,
+ * The usage of auto to implicitly get the return type is C++14,
  * the main part is using C++11 variadic templates and overloading
  */
 auto sum1() { return 0;}

tex/wtfunctional.tex

@@ -479,7 +479,7 @@ int c = accumulate(a.begin(), a.end(), 15, minus<int>());
 
 \begin{frame}[fragile]{Generics example: Folds}
     \begin{uncoverenv}<+->
-        Using \cpp{}11 with variadic templates, one has (mod \cppcmd{auto})
+        Using \cpp{}11/14 with variadic templates, one has
 \begin{cppcode}
 auto sum() { return 0; }