Request: allow (overload) string append a string_view ?

[KammutierSpule]

Currently:

string& append(const string& str);
string& append(const string& str, size_t subpos, size_t sublen);
string& append(const char* s);
string& append(const char* s, size_t n);
string& append(size_t n, char c);

template <typename TIterator>
string& append(TIterator first, Titerator last);

without using the iterator?