message: hammer: simplified a call
diff: @@ -12737,8 +12737,7 @@ class basic_json
  JSON_DEPRECATED
  friend std::istream& operator<<(basic_json& j, std::istream& i)
  {
  - parser(detail::input_adapter(i)).parse(false, j);
  - return i;
  + return operator>>(i, j);
  }
  /*!
  