Fixed formatting, trying to fix msvc build error in appveyor

test/src/unit-allocator.cpp

@@ -238,28 +238,17 @@ TEST_CASE("controlled bad_alloc")
 namespace
 {
 template<class T>
-struct allocator_no_forward
+struct allocator_no_forward : std::allocator<T>
 {
-    typedef T value_type;
     template <typename U>
-    struct rebind
-    {
+    struct rebind {
         typedef allocator_no_forward<U> other;
     };
 
-    T* allocate(size_t sz)
-    {
-        return static_cast<T*>(malloc(sz * sizeof(T)));
-    }
-
-    void deallocate(T* p, size_t)
-    {
-        free(p);
-    }
-
-    void construct(T* p, const T& arg)
+    template <class... Args>
+    void construct(T* p, const Args&... args)
     {
-        ::new (static_cast<void*>(p)) T(arg);
+        ::new (static_cast<void*>(p)) T(args...);
     }
 };
 }