C++17: Class template argument deduction (#131)

* C++17: Class template argument deduction

Fixed the user-defined deduction guide.

* Update README

Author: kevin-strobel

CPP17.md

@@ -383,7 +383,7 @@ struct container {
 };
 
 // deduction guide
-template <template Iter>
+template <typename Iter>
 container(Iter b, Iter e) -> container<typename std::iterator_traits<Iter>::value_type>;
 
 container a{ 7 }; // OK: deduces container<int>

README.md

@@ -1047,7 +1047,7 @@ struct container {
 };
 
 // deduction guide
-template <template Iter>
+template <typename Iter>
 container(Iter b, Iter e) -> container<typename std::iterator_traits<Iter>::value_type>;
 
 container a{ 7 }; // OK: deduces container<int>