Editorial issues in N4725

[jaredhoberock]

From Alisdair M:

5.3 Vector execution policy p2

Missing cross-reference in () after “sequencing constraint of wavefront application ()"

7.2.1 Header <experimental/algorithm> synopsis
This line:
template<class T> struct no_deduce_t = typename no_deduce<T>::type;

Should be an alias template declaration:
template<class T> using no_deduce_t = typename no_deduce<T>::type;

7.2.5 No Vec, p2:

Evaluates std::forward>F<(f)().

Note the angle brackets point the wrong way.

7.2.6 Ordered update class

Missing "template <class T>" above "class ordered_update_t”.

[jaredhoberock]

5.3 p2 has a stray "()" and for_loop_n should be in code font.